Season
- Season 1 2011-01-08
- Season 0 2011-07-06
Episode
- Episode 1: Wicked Usual Day of a Brother And Sister
- Episode 2: Twintail, Attacking Brother and Sister
- Episode 3: A Rival Appears! Brother and Sister in Huge Trouble!
- Episode 4: If My Little Sister Wore a Swimsuit
- Episode 5: Mister X Strikes Brother!
- Episode 6: My Brother has Dreams of Black Panty Stockings
- Episode 7: My Brother and His Friends' Akiba
- Episode 8: Aim for Brother's Top!
- Episode 9: Summer! Festivals! Brother and Sister's M:i:V
- Episode 10: Brother Saves the World
- Episode 11: Calling Out to Brother from the Center of the World
- Episode 12: I Don't Like My Big Brother at All!!
Because I Don't Like My Big Brother At-All--!! Season 1 If My Little Sister Wore a Swimsuit
Nao Takanashi loves her brother Shūsuke despite the incest taboo. Nao thinks that Shūsuke is her blood relative, but in fact she is an adopted daughter, whose parents have died. After Nao learns the fact, she wants to fall in love normally with Shūsuke because siblings by adoption can marry under the family law in Japan. However, she finds herself competing with Shūsuke's childhood friend, Iroha Tsuchiura, and his class president and yaoi lover, Mayuka Kondō.
