At the edge of Kuoh Academy's field, a brown-haired young man lay on his back, staring up at the blue sky with his brown eyes.
"So it's been seventeen years since I crossed over into this world," the young man muttered. A cold smirk formed on his face, looking cool for a moment—before it was immediately ruined by a sudden lewd grin.
"Oi, Ise! You said we were going to peek at the kendo club together, so why are you lying here alone?" said a bald student bluntly, even though a beautiful schoolgirl happened to be passing by.
"Who said that? I never agreed to doing something as disgraceful as peeking at the sacred body of a young maiden."
"What did you say?! Don't act holy, you leader of a heretical cult!"
A black-haired student wearing white-framed glasses shouted angrily at the brown-haired youth.
Before the brown-haired young man could respond, the passing schoolgirl suddenly stepped closer and scolded the bald student and the bespectacled one.
"You two perverts! Don't contaminate Hyoudou Issei-san with your filthy, lewd thoughts!"
"What? Contaminate him? He's the one who contaminated our minds and turned us perverted!" the bald student shouted irritably.
"Don't twist the facts! Hyoudou Issei-san is a good man, completely different from you filthy, disgusting perverts!"
"…Ise! Say something! Don't just stay quiet!" the bald student yelled impatiently.
"Matsuda, yesterday I already reminded you not to peek into the women's changing room. That isn't a good thing to do."
"What did you say?!"
"Ise! You traitor!" the bespectacled student shouted.
"Motohama, I've never betrayed you. I'm just doing my best to cure you of your excessive worldly desires, nothing more."
"Grrr…" Motohama ground his teeth, looking extremely irritated.
"I knew it! Get lost, you pests! You're not worthy of speaking to Hyoudou Issei-san!" the beautiful schoolgirl shouted as she glared sharply at Matsuda and Motohama.
"Damn you, Ise! I'll remember this!" Motohama declared.
"That's right! We won't even give you the latest AV, even if you beg us!" Matsuda added.
Issei smiled faintly, clearly not caring about their threats.
"Um… Hyoudou Issei-san, may I have your phone number?" the beautiful schoolgirl asked shyly.
If Issei didn't know what would happen to him tomorrow, he would definitely have given his personal number to the beautiful girl standing before him.
But since he knew he would soon be surrounded by heroines of extraordinary beauty, Issei firmly rejected such a side character.
He had to admit it—this girl was far more beautiful than even the world's top models from his previous life, just as expected from a two-dimensional character.
However, compared to the main heroines, the beauty of a side character like the girl in front of him wasn't even worth comparing.
Even so, Issei couldn't reject her outright, especially not in a cruel manner.
"Ahem, sorry. I left my phone at home, and I don't have my own number memorized."
"I see… that's too bad."
The light instantly vanished from the girl's eyes. She looked extremely disappointed, even depressed, like someone on the verge of suicide.
Ding dong, ding dong!
The school bell rang. Issei immediately made an excuse and left the girl behind without looking back.
'That was close. If I'd stayed there any longer, I definitely would've changed my mind. As expected of a two-dimensional world—female characters are absurdly beautiful, even when they're just side characters.'
Issei let out a sigh and looked up at the bright blue sky, an eager smile on his face.
By now, you've probably realized that the Hyoudou Issei in this story isn't the original Hyoudou Issei, but rather a reincarnator—an otaku from Earth named Agam.
As an otaku, Agam naturally knew a great deal about this world. After all, he was a huge fan of the High School DxD series, so it was only natural that he understood the ins and outs of this world.
For some reason, Agam died on Earth and was reincarnated into this world as Hyoudou Issei.
This was a complete reincarnation—not merely replacing the original Hyoudou Issei's soul with his own.
Agam died, and his soul reincarnated into Hyoudou Miki's womb the moment she became pregnant. So, in theory, there was never such a thing as an "original" Hyoudou Issei's soul.
At first, Issei was confused by his new life, but once he realized this was the two-dimensional world he had long yearned for, he became fired up to grow stronger and claim all the beautiful heroines for himself.
Young Issei knew the road ahead would be difficult. Even though he possessed a Longinus within his body, he was still just an ordinary human—it would be extremely hard to catch up to other Longinus holders like Vali Lucifer.
Even so, young Issei didn't run out of ideas and began training his body.
First, young Issei tried Saitama-style training. Do you know what happened as a result? He awakened the Mission System, which directly assigned him an S-rank mission.
The mission's completion requirements were very simple. Issei only needed to run ten kilometers and do one hundred push-ups and sit-ups every day for five years.
Today was the final day. Issei planned to complete the mission in the park and see what S-rank reward he would receive afterward.
He desperately hoped to obtain a reward that would enhance his base strength so he could immediately maximize the power of his Longinus.
"Alright, let's do this!"
Issei's expression hardened as he began running around the park.
… .. .
To be continued…