Hentai is based on the eponymous manga authored by Crimson Comics. This is a story about the difficult everyday life of girls-idols in the depraved world of show business.

Crimson Climax Returning to her mother's home island after her sudden demise, Ryo feels that what is anxiety her mother's odd behaviour is at her mother's origins. Despite how her mother had bade her never to revisit that island and never associate herself with Hotaruko, Ryo nonetheless feels that something should be carried out as a way to explain her mother's eccentric sexual behavior and just what caused her to act so oddly. However, what

This is a story about one of the girls a secret detective Agency "Crimson Girls". One day while investigating a case of pristaval in trains, she becomes a victim. What would be impregnable was a girl maniacs will find a way to break her spirit. So loses her virginity the first girl from "Crimson Girls" who next?