Because I Don't Like My Big Brother At-All--!! poster
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Because I Don't Like My Big Brother At-All--!!

TV·2011–2011·1 season, 12 episodes·tvk·Animation, Comedy·25m

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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.

Highest-rated episodes all ranked

  1. 01Because I Don't Like My Big Brother At-All--!! S01E01Wicked Usual Day of a Brother And SisterS01E01 · 10.0Nao 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.
  2. 02Because I Don't Like My Big Brother At-All--!! S01E02Twintail, Attacking Brother and SisterS01E02 · 10.0It turns out that Nao and Shuusuke are not related by blood. While most people would be upset after finding out something like that, Nao took it in the most positive way possible - it meant that there was nothing to get in the way between her and Shuusuke. The next day, a new student named Iroha transfers into Nao's class. At first Nao gets along with her really well, and they even end up having lunch together... but while they are eating Shuusuke comes to give Nao her keys which she left at home. Even though Iroha and Shuusuke should be meeting each other for the first time, Iroha seems strangely interested in him...
  3. 03Because I Don't Like My Big Brother At-All--!! S01E03A Rival Appears! Brother and Sister in Huge Trouble!S01E03 · 10.0Iroha 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.

Castfull cast & details

Episodes by season

Season01Episode ratings across the season — the gold bar is its best episode12Episodes2011Aired 10.0Season avg
  1. S01E01Because I Don't Like My Big Brother At-All--!! S01E01Season's bestWicked Usual Day of a Brother And SisterJanuary 8, 2011 10.0Nao Takanashi has long been trying to tempt her brother, Shūsuke, into entering an immoral (i.e. incest) relationship with her, with Shūsuke
  2. S01E02Because I Don't Like My Big Brother At-All--!! S01E02Twintail, Attacking Brother and SisterJanuary 15, 2011 10.0It turns out that Nao and Shuusuke are not related by blood. While most people would be upset after finding out something like that, Nao too
  3. S01E03Because I Don't Like My Big Brother At-All--!! S01E03A Rival Appears! Brother and Sister in Huge Trouble!January 23, 2011 10.0Iroha coerces Shūsuke into going on a date with her, and Nao decides to follow them, while her friends, Haruka and Hirono, decide to tail he
  4. S01E04Because I Don't Like My Big Brother At-All--!! S01E04If My Little Sister Wore a SwimsuitJanuary 30, 2011Nao coerces Shūsuke into going to the beach with her, though coincidentally they end up running into Haruka, Hirono and Iroha, who Nao recog
  5. S01E05Because I Don't Like My Big Brother At-All--!! S01E05Mister X Strikes Brother!February 6, 2011While running back from buying a new porno magazine, Shūsuke bumps into another person. They get their packages mixed up and Shūsuke ends up
  6. S01E06Because I Don't Like My Big Brother At-All--!! S01E06My Brother has Dreams of Black Panty StockingsFebruary 13, 2011After having Iroha spy on Shūsuke and Mayuka the previous night, Nao tries putting on black pantyhose and clinging onto Shūsuke as he sleeps
  7. S01E07Because I Don't Like My Big Brother At-All--!! S01E07My Brother and His Friends' AkibaFebruary 20, 2011Shūsuke and his friends go on a trip to Akihabara in search of adult goods while Nao and Iroha decide to follow them. After visiting an adul
  8. S01E08Because I Don't Like My Big Brother At-All--!! S01E08Aim for Brother's Top!February 27, 2011When Shūsuke gets a report about him failing in all of his subjects, he then realizes that he has to take a follow-up exam or risk having to
  9. S01E09Because I Don't Like My Big Brother At-All--!! S01E09Summer! Festivals! Brother and Sister's M:i:VMarch 6, 2011Shūsuke goes to a Matsuri festival with Nao and Iroha, who compete with each other to try and seduce him. Meanwhile, the A.G.E Explorers go
  10. S01E10Because I Don't Like My Big Brother At-All--!! S01E10Brother Saves the WorldMarch 13, 2011Late on night, Shūsuke spots a sexy cosplayer named Ran Yatagai on top of a vending machine. He later sees Ran, who calls herself Princess L
  11. S01E11Because I Don't Like My Big Brother At-All--!! S01E11Calling Out to Brother from the Center of the WorldMarch 20, 2011As Shūsuke puts up with more of Ran's dubious rituals, Rin forces Nao to hang out with her by threatening to tell Shūsuke that she had been
  12. S01E12Because I Don't Like My Big Brother At-All--!! S01E12I Don't Like My Big Brother at All!!March 27, 2011Shusuke and Nao are left alone in the house when their parents go on an overnight trip. Nao takes the opportunity to try and seduce Shusuke

Season 1 ranked & reviewed

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