Yamcha awoke the next morning in the same peaceful position; his beautiful girlfriend, or fiance he mentally corrected with a smile, still nestled beside him. Enjoying the moment of tranquility, he mentally went over the goals he wanted to achieve before the next major threat arrived.
It had been almost a year since the day he merged with Neji's soul, and he had already achieved several of his goals. Reconciling with Bulma, making a cure for Goku's heart problem, and training with Kami had all been checked off the list. With Bulma's pregnancy and fatherhood looming, he knew he had to prioritize only the most important feats first.
At the top of the list was converting the art of fuinjutsu to work with ki. He and Kami had made good headway, but progress was still slow. The issue came from having to construct an entirely new seal language to work with the new power system. As it stood now, only rudimentary applications like storage seals were functional. While it was an accomplishment, the existence of his fiancé's capsule technology rendered them obsolete. The current main goal for fuinjutsu was twofold. First, gravity seals. Bulma and his work on the gravity room gave him a solid foundation on the understanding of gravity, but the sealing language had yet to develop the "words" to define gravity.
The second goal of sealing was pure curiosity and exploration. From Everything he's seen of the Naruto world, both real and fiction, he hadn't exaggerated with his brief explanation to Bulma. Sealing really was a sort of programming language for reality, anything from a near infinite storage space to tampering with souls. Granted, he had no interest in the crueler applications like Orochimaru's curse seals, but a way to empower others with natural energy? If he could cut out the corruptive part, it would be a game changer for the human fighters.
Another priority was to get Bulma to teach him biology. Recently, he had noticed his mind changing subtly. Nothing startling, but his thoughts were becoming clearer, and he was learning things faster than either a younger Yamcha or Neji ever did. Considering Neji's prodigious learning abilities, even the small increases were noticeable. He believed this was due to the influx of mental energy he experienced post fusion. As a result, he now had a near eidetic memory. As he continued to work on his ki control and getting stronger, he could feel his soul continuing to sync with his physical form, which meant more energy to train and control. It was like diving deeper into a pool, only to find the bottom extending further away as you swam. He idly wondered how long this settling process would be, and what lay at the end of it.
As he sat with his thoughts he lost track of time, until he heard a small giggle coming from beside him. Looking down he saw Bulma smiling up at him. He gave a contented smile back. "When did you wake up?"
"About ten minutes ago," she laughed again, teasing lightly, "You were thinking entirely too loud to sleep through."
"Yeah well, can't let my genius fiance out do me can I?"
They both laughed as he pulled her closer. "We've got a lot to do these next few months you know?"
"Don't tell me you're not up for it?" Bulma continued teasing.
"Of course I am," he began bragging, sneaking his hand a bit lower, "first order of business, I need a beautiful genius to tutor me on biology." As he spoke he gave a small pinch to her firm backside. He earned a small squeak of surprise and a cute blush.
"You sure?" She asked, trailing a finger down his toned chest, her blush growing deeper. "I can be a very… demanding teacher."
"Very sure, " he smirked, now fully grabbing his lover's ass. "I'll try my hardest to please the teacher."
With a giggle, she rolled onto his lap, and they began a very busy, but very pleasurable 9 months of their life.
The next morning, Yamcha found himself on the Lookout, sitting cross-legged at the very edge of the platform. Dawn spilled over the horizon in shades of gold and rose, bathing the world in a quiet tranquility. Kami stood several yards behind him, arms tucked into his sleeves, observing in silence.
Popo, of course, simply appeared beside Yamcha one moment without having made so much as a sound.
"You seek deeper sight," Popo said calmly.
Yamcha fought back the jump at the sudden appearance. Honestly, he still had trauma from looking into whatever Popo was. He didn't open his eyes though, maintaining his focus. "I keep feeling like I'm missing something. Like I'm brushing up against something bigger. Like my ki is trying to tell me more than I can hear."
Popo nodded. "You already have the answer."
"Huh-"
A single tap of Popo's finger to Yamcha's forehead sent a spike of ki surging through his body, not painful, but clarifying.
His breath hitched. Instinctively, Yamcha activated his Byakugan. It was then that he saw it, clearly seeing what his ki was trying to tell him.
It was his eyes. His body and ki had reached a threshold, and it instinctively wanted to evolve, like something in his DNA was pushing him to advance.
Listening to his ki, he let it pool behind his eyes, guiding it the way Neji once taught himself to refine chakra.
The world bloomed.
When Yamcha opened his eyes, his right iris shimmered sky blue. A faint, crystalline glow shone through, like light reflecting off water. For a heartbeat, the universe unfolded.
He saw ki not just as energy, but as language. A living script woven into everything: plants, air currents, the pulsing heartbeat of the world below. The vibrations carried meaning, slight changes carrying intent. Every life form was a sentence, every form of energy a word.
The deeper he focused, the more the patterns harmonized.
"I understand," he thought to himself, "Ki has its own will. Everything from gravity to heat. If I can learn to read it…"
The glow faded, but the clarity remained.
Kami approached, a combined look of surprise and recognition on his face. "You've… triggered an evolution in your perception. This is not something I thought mortals could do."
Popo simply nodded. "He sees a little now. It's a start."
Kami and Yamcha both looked at Popo for a second.
"How does he make the monotone sound sarcastic?" Yamcha thought.
Yamcha exhaled slowly, grounding himself. The right eye felt warm, lighter than his left. It was like a new muscle flexing for the first time.
"So this is the first step towards evolving my eyes."
A week later, Yamcha and Bulma stood in Capsule Corp's medical wing as Goku sat on the exam bed swinging his legs like an oversized child.
"Are you sure this is safe?" Goku asked.
"For the 37th time, YES," Bulma snapped, though the slight tremor in her hands betrayed her nerves. "Just sit still!"
The serum glowed a soft blue as Bulma inserted it into a reinforced injector. Yamcha's right eye gleamed faintly, his perception deeper now, more stable. He could now sense the slight disruption in the ki surrounding Goku's heart, and how the frequency in the antidote hummed in opposition to it.
Bulma administered the injection, and for a tense moment nothing happened.
Then Goku's ki surged, flaring bright gold. Yamcha's right eye glowed brighter as he watched the toxin's dark threads evaporate like ice under the sunlight.
He saw everything: the re-balancing, the stabilization, the immediate relief washing through Goku's system. It even seemed like his ki flowed easier now that the metaphorical speed bump was out of the picture.
Bulma watched the monitors and gasped. "It's working. It's ACTUALLY working!"
Goku blinked, flexing his fingers. "Wow! I feel… AMAZING! Like I could eat a whole table of food!"
"You do that anyway," Yamcha said, laughing.
Bulma's shoulders slumped in exhausted triumph. Yamcha gently put a hand on her shoulder.
Goku hopped off the table, immediately throwing a few punches in the air. "Seriously! You guys are amazing!"
Yamcha smiled faintly. "Just glad you'll be around a while longer, buddy."
As Goku flew off to tell Chi-Chi the good news, Bulma leaned into Yamcha's side, exhausted but glowing. "You realize we basically just solved magic, right?"
He chuckled. "All hail earth's new goddess of science."
She smirked. "Thank you, my high priest of crazy ideas."
They laughed together, the tension from months of worry lifting at last.
Months later, Yamcha stood in a training chamber at Capsule Corp. Sheets of metal, chalk arrays, and glowing ki infused ink covered the floors and walls.
Bulma watched through the glass, recording data as Yamcha placed a small, circular tag onto the ground. His handwriting in he and Kami's newly made seal-script had grown fluid.
He had used his new eye to observe the gravity chamber. After a long conversation with his fiance about why one of his eyes was glowing, he explained that he could see the "language" of the energy that affected gravity. It had changed the sealing script from a brute force application of ki, to something more elegant and effective.
He had explained it to Bulma as the difference between a poorly translated set of instructions, to someone explaining in their native language. Whereas the translation could work, having something explained in your native language would make it easier, and more effective.
"Gravity Seal, test 11," he said softly. "Let's try this again."
"Try not to break anything this time." Bulma teased from the other side of the glass, looking at the 10 sets of craters from previous failed tests.
"No promises!" Yamcha called back before channeling Ki into the tag.
The world bent.
The air condensed, pressure rippling through the room. The floor groaned, but did NOT crack this time. Yamcha's body sank slightly under the weight, testing how his ki held under strain.
"Four-point-nine Gs stable…" Bulma muttered, eyes wide. "Five-point-zero… still stable… Holy shit! Yamcha, you did it!"
With a controlled exhale, he released the seal.
He picked up the tag, holding it up to the glass and smiling triumphantly. "Next step is making it wearable."
Bulma grinned as she watched him leaving the test lab and joining her in the observation room. "I already have ideas, Capsule-compatible."
"Of course you do."
He leaned down and kissed her forehead before returning to his notes, already brimming with ideas of his own.
Late one night, months later still, Yamcha sat alone with textbooks on anatomy, biology, and his own notes on internal energy regulation spread across his desk. His right eye glowed faint blue as he reviewed microscopic ki interactions inside his own cells.
Behind him, Bulma slept peacefully on the couch, her hands resting on her now swollen stomach. He tried to usher her off to bed, but she insisted on staying with him until she passed out.
He had been working on his own theory of how ki integrated with biology. With his study into biology and observations on Bulma and other humans, he knew that his biological makeup was somewhat unique. Whereas normal humans had ki flowing through their cells, Yamcha's cells seemed to have their own rudimentary ki circulation system.
He had visited Roshi a few times, and while sparring with him and Krillin he noticed what a difference this made. While Krillin was at full power he could see how his cells reacted, they seemed to be under stress. This was exemplified when he observed Roshi's full power form. Much like his physical form, the walls of his cells expanded, allowing him to channel additional ki.
The downside was, it put extreme strain on the cell walls, and it was obvious that over use would lead to extreme cellular degradation. It reminded him how Rock Lee and Might Guy's bodies reacted to opening the 8 gates.
When he compared it to how his cells reacted, there was a stark difference. The integrated ki circulatory system allowed for a greater ki flow, and the built in structure allowed for a greater malleability to his cell walls. The realization gave birth to a new theory.
Focusing inward, he gently probed at the first gate, coaxing it to open just slightly. As it began to slowly open, his new eye's perception allowed him to visualize the process.
"On a side note, I really should come up with a name for my new eyes." He mused as he observed the changes in his body.
As his ki output increased, he began to sense its rhythm, how the gate itself functioned.
A regulator. A limiter. A natural cadence.
"What if," Yamcha whispered, "instead of breaking the limiter, I harmonize with it?"
He tested it again, this time focusing not on forcing the gate open but guiding his biology to adapt to that state.
Cellular structures shifted. Ki pathways widened and strained but he persevered. His body responded, slight pain, but his ki almost seemed curious. Like a machine recognizing an alternate operational mode.
His breath caught.
"Holy Kami. This is it. I could-" As his excitement grew his control slipped. His body, still unfamiliar with this new state, responded.
Tendons tore, muscles ripped, ki ran rampant.
He bit back the scream and swallowed the senzu bean he had prepared beforehand.
That ended poorly, but it proved his thesis. He could harmonize with the gates, and his body could adapt.
He wrote the words Eternal Gate Theory — Initial Framework across a new page.
Behind him, Bulma stirred in her sleep, mumbling something about capacitor arrays and baby names.
Yamcha smiled softly. "For you two, I promise, I'll master this."
Nine months had passed in a blur of breakthroughs, laughter, quiet nights, and whispered promises.
And then, the day finally arrived.
Capsule Corp's private medical wing bustled with quiet precision. Yamcha paced the hallway with a mix of fear and excitement unlike anything he'd felt in either lifetime.
With Capsule corps advanced medical tech, Bulma was thankfully in minimal pain. He had pushed his senses to their limit, nervously monitoring the delivery room to make sure both his love and child were safe and stable.
As he paced, a sudden cry pierced the air.
The doctor stepped out moments later, smiling. "She's here. Healthy. Strong. You can come in."
Yamcha entered the room slowly, breath catching.
Bulma lay propped against her pillows, exhausted but glowing, hair messy and eyes bright. In her arms was a tiny swaddle of blue cloth.
"She's beautiful," Yamcha whispered.
His eyes grew misty as he looked at the bundle in Bulma's arms. The part of him that had been Neji had never expected to have children, or even to find love.
He had sworn to himself that he would never bring a child into the world, only to have it marked by the same cruel seal that tortured both him and his father.
This past nine months had begun healing scars that Yamcha's soul had inherited. Standing here, looking at the precious life that he and his soon to be wife had created, the pain that he never knew he carried faded away.
Bulma smiled weakly as the tears fell from her man's eyes.
He knelt beside the bed, gently touching the baby's tiny fist as it wrapped around his finger.
"Hey there… little Toshi."
Bulma blinked. They had made a list, and narrowed it down to a handful of names they both agreed would fit. She agreed he could make the final call on this name if she could choose for their second child. "You decided on Toshi?"
"I like it, don't you think it fits?"
A soft, emotional chuckle escaped her. "Toshi Briefs… I love it."
Yamcha leaned forward and kissed Bulma's forehead, then their daughter's.
In that quiet, fragile moment, surrounded by the hum of machines and the soft glow of dawn, Yamcha felt something settle deep inside him.
Purpose.
Clarity.
Peace.
Love.
He had achieved something that neither parts of his soul had ever thought they would.
And now… they would face the future together.
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(A/N) I'm open to suggestions if anybody wants a change to the baby name. I wanted to go with something different than Bulla or Bra. Trunks will still exist, just later in the story.