Mama Description: "After the death of his father, Yuichi comes to live with his stepmother, Yukiko. Yuichi doesn't know much about Yukiko, until he finds a video tape showing his father having sex with her. At his new home, Yuichi meets Mika, his step-sister. Mika is Yukiko's adopted daughter. Mika, having seen Yuichi's photo, is already in love with him.
"Mika watches the video tape as Yuichi unpacks his belongings. Yuichi is embarrassed, but Mika doesn't seem to mind. That night, Yuichi can't help but watch that video again, masturbating as he sees his stepmother and father get it on. That's when Mika enters his room. She tells him how she's been in love with him for a long time. Stripping off her clothes, she asks Yuichi to make love to her. Embarrassed and confused, he rejects her. Mika runs from the room and comes back with dozens of video tapes. Yuichi is shocked when he finds out that every single video tape shows Yukiko having sex with some new guy.
"Later that night, Yuichi is in bed, when Yukiko, completely naked, comes to his room. Yuichi is bewildered and excited. Not sure if he's awake or dreaming, he responds to Yukiko's sexual advances. Just as they reach their climax, Mika enters the room, naked except for the fake penis she's wearing. Mika has sex with Yukiko, while explaining to Yuichi that when she first saw Yukiko's sex videos, she too was shocked. Since then she has been using this fake penis on Yukiko in hopes of curing her nymphomania. After Yukiko has her orgasm, Mika turns to Yuichi. They end up having a sex too.
"The story concludes with Yukiko alone, watching a video tape of the sex they just had the night before. We aren't sure if Mika and Yuichi know about this tape or not."
