- 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!!
Iroha coerces Shūsuke into going on a date with her, and Nao decides to follow them, while her friends, Haruka and Hirono, decide to tail her as well. Iroha takes Shūsuke various places including a movie theater, an arcade and a swimsuit store. At the end of the date, Iroha tries to get Shūsuke to kiss her, but he refuses. Iroha tries to drag him somewhere else, but Nao manages to bail him out. Nao begins treating Shūsuke coldly, leading him to realize that she knew about his date with Iroha. When Iroha scares Shūsuke with the notion that she knows everything he’s been doing (having been watching him through a telescope), Shūsuke rolls on the floor when Nao enters, getting a look at her panties which reawakens his normal perversion, much to Nao’s delight.