- 1Wicked Usual Day of a Brother And Sister
- 2Twintail, Attacking Brother and Sister
- 3A Rival Appears! Brother and Sister in Huge Trouble!
- 4If My Little Sister Wore a Swimsuit
- 5Mister X Strikes Brother!
- 6My Brother has Dreams of Black Panty Stockings
- 7My Brother and His Friends' Akiba
- 8Aim for Brother's Top!
- 9Summer! Festivals! Brother and Sister's M:i:V
- 10Brother Saves the World
- 11Calling Out to Brother from the Center of the World
- 12I Don't Like My Big Brother at All!!
Nao Takanashi has long been trying to tempt her brother, Shūsuke, into entering an immoral (i.e. incest) relationship with her, with Shūsuke barely being able to resist. Nao goes to great lengths for Shūsuke to think of her perversely by doing things such as letting him purposely look underneath her skirt (and once letting him see her completely naked) but then she always gets him into trouble afterward so as to make it look like Shūsuke is the immoral pervert. One day, while Nao searches through Shūsuke’s room for his collection of porn magazines, she then finds a hidden family photo album and is surprised to find out that there are no childhood pictures of her in it. After Shūsuke was finished being scolded about his porn collection, Nao confronts her parents, Shūji and Nanaka, about the album.