キミとは致命的なズレがある

Umisato Katsuya woke up in the school’s infirmary. Why was he even here? According to the school nurse Kagami, he tripped while walking down the stairs and lost consciousness because of the impact…Except, Katsuya himself remembered none of that. Because of an accident dating back many years, he had lost both his parents and the memories of his childhood, only leaving him with what he experienced after moving. However, as if that was only the beginning, weird things started happening around Katsuya.

A girl’s corpse next to a vending machine. An ominous letter appearing out of nowhere. The soft feeling of a girl’s neck within his grasp, as she begs for help. Are all of these irregularities reality or just a fragment of his imagination? The past comes back to haunt Katsuya, as it even takes shape to hunt him down to punish him for his sins. But what lies at the core of the past that Katsuya himself had forgotten?