Based on the erotic game by Blue Gale. 
 
Continuing after the events of Oni Chichi: Re-birth... Airi, Marina, and their step father, Takami, leave for a trip to a hot springs resort. But Marina makes last minute plans and just the two of them go. Takami still constantly tries to drug Airi.

Based on the erotic game by Blue Gale. 
 
Airi keeps her relation with her father but he treats her as an object sometimes which makes her angry. One day while watching a movie she gets assaulted giving start to an affair with one of her school's teachers.
 
(Source: Anime News Network)

Based on the erotic game by Blue Gale. 
 
The latest series of the Airi storyline finds the three main characters adjusting to their current setting of an open adult relationship. The setting is completely disturbed when Airi and Marina's mother, Kayako (華代子), returns and seeks to "rebuild" her relationship with the stepfather, unaware of him having sexual relations with her two daughters. Also the stepfather is becoming more and more abusive to Airi who has been challenging their relationship with another young lady.

Tags