Scene: A portal appears. Tianzhu and Rundie step out of it. Kelly is standing in front of them. They are inside the Human Kingdom Palace.
Kelly: "?"
Tianzhu: "So, why are we here, Master?"
Rundie: "I thought I should meet Kelly once before you leave."
Kelly: "Leave? Where are you going?"
Rundie: "I'm not going anywhere. Tianzhu is going back to his academy."
Tianzhu: "What?!"
Rundie: "Yes. I trained you as much as I could. Now you need to gain experience on your own and become stronger."
Tianzhu: "I see…"
Scene: Kelly walks up to Tianzhu.
Kelly: "Tianzhu, if you ever need help, just tell me once and I'll help you."
Tianzhu: "Hm." (nods)
Rundie: "You never say that to me."
Kelly: "Hmph! You're not a kid!"
Rundie: "Well—"
Monster Attack News
Scene: Suddenly, the ground shakes. A soldier runs in, full of panic.
Soldier: "P-Princess! There is a monster attack! Where is the King?!"
Kelly: "! Father is not here! How many monsters are there?!"
Soldier: "I think about 200!"
Kelly: "! Where are the city guards?!"
Soldier: "Half of the guards are already injured, and the rest are evacuating people!"
Kelly: "Tsk! Rundie!"
Rundie: "I will not go."
Kelly: "?! Why?! This is the time!"
Rundie: "No…"
Kelly: "I didn't expect this from you! Do you not love this place?!"
Rundie: "I won't go. But my student Tianzhu will."
Kelly: "! Are you out of your mind?! He is just a 15-year-old kid! How can he fight 200 monsters?! If you don't want to fight, fine! I will fight! But I will not send this kid!!"
Tianzhu: "…"
Tianzhu (thinking): She talks too much…
Rundie: "Calm down… He can do it. I trust him. Right, Tianzhu?"
Tianzhu: "Yes, Master."
Kelly: "But there are too—"
Tianzhu: "Don't worry, Princess. I am strong. And look, I'm Rare Rank Level 3."
Kelly: "Yeah, I saw that."
Tianzhu: "Then it's final. I'm going."
Scene: A portal appears behind Tianzhu. He enters it, and it disappears.
North Side of the City
Scene: Houses are destroyed. Blood is on the ground and walls. Many humans are dead. Monsters are still moving and killing people. Soldiers are trying to stop them.
Soldier: "Shadow Blast!"
Scene: A blast hits a monster's shadow. The monster is over 5 meters tall. The fire and dust disappear, and the monster only gets a few scratches.
Soldier: "! Damn!"
Scene: The monster attacks with its tongue and grabs the soldier.
Soldier: "!! Fire Punch!"
Scene: His hand is covered in fire. He punches the monster's tongue, hurting it. The monster releases him.
Monster: "Agh…"
Scene: Another monster bites the soldier mid-air, cutting his body in half.
Soldier: "Agh…!"
Other Soldier: "No…!!"
Soldier 2: "What do we do?!"
Soldier 3: "We must rescue every human! Then we can fight!"
Soldier 4: "There is no way we can fight this many monsters!!"
Soldier 1: "Yeah, we are only about 40, and there are too many monsters!"
Soldier 5: "But what can we do?! If we can't stop them, the whole city and the king's palace will be destroyed! Everyone will be killed!!"
Soldier 3: "That's why we fight!"
Soldier 6: "Yeah! Let's go!"
Tianzhu Arrives
Scene: A portal opens in front of them.
Soldier 2: "! What is that now?!"
Scene: Tianzhu steps out.
Soldier 4: "It's a human! It's… a kid?!"
Scene: Tianzhu looks around. Monsters are destroying houses and advancing.
Tianzhu: "So those are the monsters…"
Scene: He notices the soldiers.
Tianzhu: "All of you, fall back for now. Are there any other humans here?"
Soldier 5: "Hey kid! This is dangerous! Get out of here!"
Scene: Tianzhu ignores him.
Tianzhu (thinking):
When I killed the demon army monsters, there were no allies. But here, there are allies. I can't use mass destruction magic. I'll finish this with small magic.
First Counterattack
Scene: A monster notices Tianzhu and charges at him. Its horns grow bigger and shine.
Tianzhu (thinking): I need to kill them fast!
Scene: Tianzhu disappears. Dust flies where he was standing. A straight line of dust rushes toward the monster.
Scene: Tianzhu punches the monster's face. His hand turns into a large red-scaled monster hand.
Slow Motion:
The punch hits. The monster's skin vibrates, then cracks, revealing its body mass.
Back to normal:
A massive impact wave spreads. Nearby houses shake and collapse. The monster flies far away and crashes into the ground, bouncing.
Monster: "Kng… kng… kng…!"
Tianzhu (thinking): That was easy. But there are too many.
Scene: More than 20 monsters appear.
Tianzhu (thinking):
Tsk. If I had an army, this would be easy… But this is why I love this isekai world. I can do whatever I want. Anyone who tries to stop me—just kill them. (badass smile)
Shadow and Thunder Magic
Tianzhu: "Shadow Bind."
Scene: His shadow moves. Over 20 shadow chains come out and capture the monsters.
Monsters: "Snh…! Zhh…!" (trying to escape)
Tianzhu: "Hell Thunder!"
Scene: Thunder appears on the chains and strikes the monsters. Blood flows from their bodies. They die instantly.
Tianzhu: "Where are the other monsters?"
Scene: He looks at the soldiers. His eyes glow with dangerous silver aura.
Soldier: "T-There are some other m-monsters…" (trembling)
Tianzhu: "Got it."
Scene: Tianzhu flies toward the south side at high speed.
South Side of the City
Scene: Only five monsters remain. They are about 20 meters long, bird/fish-like with many horns. They shoot fire from their mouths and thunder from their horns, destroying buildings and killing humans.
Humans: "Aaa! Agh…!" (crying, screaming)
Scene: Many kids are crying. Many humans are trapped under big stones and screaming for help. Others are running. Old people who can't run are hit by fire or thunder and killed.
Monsters: "Gha…! Hn…! Zzn…!"