Cuican de Safula zhi Xing -Katis-

——This is a story about a boy and a girl.

Ten years ago, the boy lost his memory and also lost his memory about her.
——A very important memory for him.

With the help of a doctor in biological brain science, the boy embarked on a journey to regain memory fragments.

Where is this place?
What happen in this world?
He woke up in a mysterious laboratory.
He met a girl with horns on her head.
……
The vague memories gradually came to mind.
But……