There is a secret between the stepfather and his wife’s biological daughter, Urara Kanon. A secret that she cannot tell anyone, not even her friends, teachers, or her mother. The perverted stepfather frequently forces Urara to have sex with him every day, as he is the one who supports the two of them, so she does not dare to resist or report this to anyone else. Urara has to endure such a life, even though she currently has a boyfriend, and the two of them are intimate at home while the stepfather has seen everything.