Kizumi Magashi is a 17 year old teenager who is depressed and he lives with his parents and sister: Keiko Magashi a 15 year old teenager. His sister is very weird with him like in a romantic way. Kizumi and his sister go to Hiakuja High School and spend their everyday at school. The story progresses with the development of characters and their relationship while facing problems and a mistery about the school.