Boku wa Imouto ni Koi wo Suru

What would you like to edit?

Alternative Titles

Synonyms: I'm My Little Sister's Secret, I'm in Love With My Little Sister
Japanese: 僕は妹に恋をする


Type: OVA
Episodes: 1
Status: Finished Airing
Aired: May 18, 2005
Licensors: None found, add some
Source: Manga
Genre: RomanceRomance
Demographic: ShoujoShoujo
Duration: 49 min.
Rating: R+ - Mild Nudity


Score: 6.261 (scored by 2244122,441 users)
1 indicates a weighted score.
Ranked: #73862
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #2844
Members: 39,663
Favorites: 84

External Links

Ranked #7386Popularity #2844Members 39,663
Add to List
Episodes: /1
* Your list is public by default.


Yori and his twin sister Iku used to be very close as children but lately Yori has grown colder toward Iku and is always eager to stay away from her. Iku was confused by Yori's attitude. Actually Yori is in love with Iku and that forbidden love is causing Yori sleepless nights since Yori and Iku are sharing the same room with bunk beds. Yori tried to ease his intense desire for Iku by bedding Iku's best friend. He had even applied to attend a boarding school in another city to take him far away from Iku. Yori lost his resolve to stay quiet about his feelings when Iku started to talk about having a boyfriend and going on dates. Now Yori want to have his little sister and he confessed. Iku loves her big brother and wanted them to stay together, so Iku is willing to anything to keep them together. But Yori wanted to have Iku as a lover, not as a sister loyal to her twin.


No background information has been added to this title. Help improve our database by adding background information here.

Related Anime

Characters & Voice Actors


Teramoto, Yukiyo
Director, Episode Director, Storyboard
Hayase, Hiroyuki
Sound Director
Aoki, Kotomi
Original Creator
Machida, Touko


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Boku Wa Imouto Ni Koi Wo Suru - OP" by Susumu Ueda

Ending Theme

"Ai ga Hoshii" by Shion

Feb 22, 2009
NoHerozV2 (All reviews)
Ok I've watched close to 80 different anime, all types, and one thing I've learned is that you cant judge until you watched the whole thing. However, when I heard of "I Love My Younger Sister", I was skeptical. I mean, there are some messed up anime out there, but a story about twins not wanting to love each other as siblings but as lovers? Now thats messed up, but when I saw reviews and thought about it I decided, "What's the harm?". And when I finally watched it, Wow! What a amazing story! Ok, it was beyond depressing, but it was still really good. read more
Sep 13, 2009
MJ92 (All reviews)
Okay this is my first ever review written so please bear with me if my review writing skills aren't top notch. I was compelled to write a review for this OVA as the ratings of other reviews confused me as whether this was a outstanding OVA or mediocre. So here it goes:

Boku wa Imouto ni Koi wo Suru is I'm in Love with my Little Sister in english and from the title we can already see where this OVA is heading. The story doesn't incorporate many different elements to fully flesh out the story however considering the length of the OVA it is very much read more
Jul 24, 2007
darksaber (All reviews)

Boku wa Imouto ni Koi wo Suru

This is a great film, although it plays only in 50 minutes, but the satisfaction is there, despite of the title " we all know i love my younger sister" is not acceptable but when u are there watching, there u can say on that spot i will give consideration for yori and iku.....

this is not really a disgusting film that "twin brother and sister are havings ex with each other" but here u can feel what love is, and what love is all about

i wish, they will release another episode of this film, i read more
Mar 26, 2008
TweetleCake (All reviews)
Im not sure much is to be said about this story. To be honest it was a bit generic. "Sweet innocent lil sister or in this case twin sister, he loves her, he struggles with it, she comes to realize it. Oh but what about Kami-sama!
They get over it..screw the gods, make out, the end."
Not to say its not a cute story and the art was pleasent to the eye.
The music was also cute ,but theres wasn't much to it. Its pretty short so
i guess that shouldve been my first clue not expect too much.
Check it out on youtube if read more


Recent News

Recent Forum Discussion

Poll: Boku wa Imouto ni Koi wo Suru Episode 1 Discussion
Teddy - Jul 18, 2008
44 replies by hanakocheeks »»
Oct 14, 3:23 AM
Forbidden Love?
Lilly1x - Feb 8, 2009
14 replies by 2077 »»
Aug 6, 3:31 PM

Recent Featured Articles

10 Taboo Anime That You Would Rather Not Get Caught Enjoying

10 Taboo Anime That You Would Rather Not Get Caught Enjoying

Incest, loli, extreme gore, and cannibalism are just some of the subjects considered taboo but they are not really rare in anime. Can you guess which taboo anime shows have found their way to this list?
Top 15 Anime Mothers: Every Day is Mother's Day

Top 15 Anime Mothers: Every Day is Mother's Day

Anime mothers portray a wide spectrum of characteristics. Whether they're tough as Hitler or as soft as a bunny, they indulge a great deal of affection for their children and family, and are usually the sole bread winners of the family. We present to you the 15 best anime mothers of all time!