The story’s protagonist.

The accident that killed his family resulted in him having a type of brain damage that makes the world appear as a hellscape of gore. Only one thing appears pure and human -- the beautiful Saya.

A mysterious girl who encounters Fuminori while searching for her missing father.

Their meeting changes them both in ways neither could have imagined.

Fuminori’s best friend.

While disturbed by Fuminori’s strange behavior, he nevertheless struggles to maintain their friendship.

Koji’s girlfriend.

A kind woman who tries to help her friend Yoh cope with the changes that have driven her and Fuminori apart.

Omi’s best friend.

Has feelings for Fuminori, but is finding it difficult to deal with the changes in his behavior since the accident. Unlike the assertive Omi, she tends to go along with what other people want.

Fuminori’s chief physician, whom he has visited for regular checkups ever since the accident.

She seems to have some connection to Ogai Masahiko, Saya’s father.