Yuuto has brought service from the Ijiyuuin household to atone for his father's misdeeds. He works hard and catches a person's eye of Serena, the second daughter from the family. Utilizing her voluptuous body, she entices Yuuto. However, Selena is truly a vampire, and her partners don't live beyond eventually.

The main character of hentai - Koichi-kun's usual calm young man. He is married five years and lives a happy life with his wife Kanako and daughter, Nao. Once it comes to his neighbor with a strange then for him the question "do You want to have sex with a married woman?". Of course, Koichi was treated with irony and did not attach importance to this issue, but...

Keith returns home to tell his father of his intention to be a painter, and discovers that the maid his father has hired is actually a prostitute his father shares with other men. What will he do when his father hires another maid for Keith and tries to induct his son into his carnal activities?