In a post-apocalyptic Japan, two worlds unfold in parallel:
One inside a mysterious facility where children live in a controlled, “perfect” environment.
The other in the ruined outside world, where monsters roam and survivors struggle.
The story follows Kiruko, a tough and capable young woman traveling with a boy named Maru, who is searching for a place called “Heaven.” Their journey reveals secrets about identity, cloning, and the dark side of human experimentation.
⚧ Kiruko's TS (Transgender) Background
Kiruko looks like a girl, but her brain actually belongs to a boy named Kiruta (her younger brother).
After an accident, Kiruta’s brain was transplanted into his older sister Kiruko’s body to save his life.
So, Kiruko = Kiruta’s mind + Kiruko’s (sister’s) body.
She now lives as Kiruko, but often reminds others:
“I’m not really a girl. I’m a boy inside.”