In the year 2257, natural-born men are on the verge of extinction after the devastating Mana Cataclysm. Kaito Aoyama, an ordinary 17-year-old loner from 2025, awakens in this strange future—suddenly one of the rarest and most valuable people alive.

Enrolled in Peak Harem Academy, a high-security institution built to safeguard and "utilize" the last natural males, Kaito is thrust into a world of breathtaking women who see him as humanity’s final hope: Akane (the cold yet secretly caring secretary), Aya (the gentle tutor longing for a real family), Mio (the energetic fighter driven by loss), and Rei (the stoic combat instructor hiding quiet pain).

Surrounded by teasing training sessions, accidental close encounters, mandatory health checks, and constant pressure to "contribute," Kaito refuses to become just a breeding asset. He wants to live on his own terms in a society that demands he surrender them.

But as monster threats escalate, political superpowers play deadly games behind the scenes, and the women around him begin to see him as more than a resource, Kaito must decide what—and who—he truly wants.

A slow-burn sci-fi harem romance packed with mystery, heartfelt moments, tasteful ecchi tension, and high-stakes action. In a world that wants to own him, Kaito will fight to choose his own path.

The training field was quiet at night. Only the soft hum of security lights and the occasional rustle of wind through the trees.


She moved like water and steel at the same time. Each strike precise. Each step deliberate. Sweat glistened on her bare arms, silver hair tied high, sticking slightly to her neck.


I stood at the edge of the field, half-hidden by a pillar, just watching.


She was beautiful in a way that hurt to look at. Not flashy. Just… determined. Like nothing could stop her, even if the whole world tried.


After a while she stopped. Lowered her blades. Turned.


"You're acting like a stalker," she said, voice calm but pointed. "Watching me."


I stepped out, rubbing the back of my neck.


"Sorry. I wasn't— I mean, I was just… seeing how determined you are. Fighting alone like that."


She sheathed her blades and walked over.


Close enough that I could smell the faint sweat and night air on her.


"Everything we do now," she said quietly, "is manipulated by the past."


She didn't meet my eyes—just stared out at the empty field.


I started walking slowly along the path.


"But how long are we going to keep blaming the past for our current condition?" I said. "I think the best we can do is keep moving forward… for the people right now."


Her arm brushed mine once—accidental.


Later that night I was in my room, half-asleep, shirt off, sprawled on the bed.


"Sorry. But I have something important to tell."


I scrambled, grabbed my pants from the floor, pulled them on fast—almost tripped.


"Minister Aiko has been monitoring your performance. You haven't mated with anyone. So she's giving you a task. To prove yourself. Otherwise they can't continue providing these resources."


"Yes. In the Southern Prefecture, the caves broke out again. The soldiers stationed there were killed. The monsters are heading here. Our task is to go and stop them."


"Because he broke the rules. He mate with his personal assistant. So he's being punished too."


"When did the Japanese government capture the western peninsula? I mean… the Korean islands."


"I don't know the full details. But it wasn't supposed to be that long. There was a man—Yoon Taehyuk—who protected that peninsula alone for years. Because they were trapped in chinese debt trap"


Chapter 22 - Chapter 22 - Blame and Duty