アメコヒメ

Masashi Noro's mother committed suicide when he was in the second year of junior high school. Noro has become apathetic to living after that incident. One day, when summer vacation is approaching, Akira Otonari, a close friend from elementary school, receives a phone call from Noro. When Akira rushed to Noro's room, a girl with a full-body burn lies there. (Source: Fusion Product, translated) Note: Includes 1 extra chapter.