Itto Shimada

Mitsuki and Yuya become stepsister and stepbrother because of their parents' marriage. Mitsuki can't get along with her new family and Yuya doesn't know how to approach his new stepsister. One day, Mitsuki becomes possessed by the spirit of Hiyori. Hiyori likes Yuya and believes Yuya can help her get to heaven. Hiyori places a leather chastity belt upon on Mitsuki and a plan takes place to help send Hiyori to heaven.

A graduate of American Harvard University with a degree in justice, Daigo is a wanderer who steps into the life of Miura Hiroki after seeing the boy bullied. Becoming employed as a teacher at Hiroki's school, Daigo works continually to unearth the source of Hiroki's sadness and try to revitalize his love for life.