My Imouto: Koakuma na A-Cup

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Alternative Titles

Synonyms: My Sister: Little-Devil with an A-Cup
Japanese: My妹~小悪魔なAカップ~


Type: OVA
Episodes: 2
Status: Finished Airing
Aired: Jul 6, 2012 to Sep 28, 2012
Producers: Mary Jane, Studio 1st
Licensors: None found, add some
Studios: Lilix
Genre: HentaiHentai
Duration: 15 min. per ep.
Rating: Rx - Hentai


Score: 6.611 (scored by 51965,196 users)
1 indicates a weighted score.
Ranked: N/A2
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #5971
Members: 12,318
Favorites: 41

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Ranked N/APopularity #5971Members 12,318
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Episodes: /2


Once again, the peaceful morning is shattered by a diatribe delivered by a sister to her brother. This is a daily occurrence at the Utsumi household, and the fact that his relationship with his step-sister, Miyu, isn't improving is a cause of anguish for Mitsuru. While she may behave like an angel in the presence of their parents, when they are alone, she's a pure devil.

One day, Mitsuru discovers that Miyu has a complex regarding her bust-size. He unwisely brings it up and she blows up at him. While attempting to restrain the raging Miyu, the two lose their balance and fall. Staring into Miyu's face up close, Mitsuru finds himself drawn by her cute features, the warmth of her body, the peculiar scent of a young girl...

(Source: translated and adapted from official site by Cranston)

Characters & Voice Actors


Original Character Design
Tsuzuku, Ryuuji
Key Animation


Opening Theme

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Ending Theme

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Sep 10, 2012
My Imouto: Koakuma na A Cup, is about just an ordinary family with step sisters and brothers, we are firstly introduced to the main characters when they first met. their parents married each other and so they became brother and sister, starting a new family. Though there is really no strong point to the story, its just a good slice of life to watch and see the progressive relationship between the two. i would recommend some people into watching this, but this hentai is absoutely unfappable as the story is just too cute for me :3
Mar 2, 2013
This hentai, unlike the others, had a great story development. First, she displays a tsuntsun personality, then after feeling something for her brother, she becomes Deredere. Her character is indeed cute and very innocent, and I too would want that. It was enjoyable and erotic how she is pleasured by her first time with sex. I find this very enjoyable 100/10.
Mar 27, 2014
Mixed Feelings
This would have been better without the sex scenes.

It suffered from the typical problem of escalating too fast, would have been far better if the relationship had been teased out more slowly.

I also had issues with how the nipples were drawn.


Recent News

Recent Forum Discussion

Poll: My Imouto: Koakuma na A Cup Episode 2 Discussion
notsureifsrs - Oct 2, 2012
15 repliesby Chika_tetsu »»
Oct 29, 2022 5:45 AM
Poll: My Imouto: Koakuma na A Cup Episode 1 Discussion
Hmmmmmmmmmmm - Jul 8, 2012
13 repliesby Juanmamola76 »»
Mar 19, 2017 10:15 AM