The protagonist, Kyou, attends a school for boys where his appearance often gets mistaken for that of a girl. Despite this, he is the leader of a delinquent group and engages in various misdeeds. At home, he masquerades as a "nekama" (a male player pretending to be a female) in an online game, deceiving and mocking other players.

One day, Kyou steals a can of juice from Nakano, who is a target of bullying, and drinks it all. As a result, his body starts undergoing changes.

Kyou's appearance gradually transforms into that of a girl as time goes by.