This hentai is about a young guy named Keiichi from the Hayama family. Long time ago he dreamed of having sex with a beautiful girl of his childhood and then one day he finds himself alone with her and has sex with her, the next day he finds out that the very girl he had sex with is called Reika, her parents died and the Hayama family has decided to accept her into their family. Keiichi becomes a slave to Reiki from this point on, but he loves it. He is unaware of Reiki's dark past, but then he begins to guess about it and will he be able to unravel it to the end ?