Imouto sae Ireba Ii.

A Sister's All You Need

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Alternative Titles

Synonyms: It'd be Good if Only Little Sister Was Here
Japanese: 妹さえいればいい。
English: A Sister's All You Need
German: A Sister's All You Need
Spanish: A Sister's All You Need.
French: Imôto sae ireba ii
More titles


Type: TV
Episodes: 12
Status: Finished Airing
Aired: Oct 8, 2017 to Dec 24, 2017
Premiered: Fall 2017
Broadcast: Sundays at 22:30 (JST)
Licensors: Funimation
Genres: ComedyComedy, RomanceRomance, EcchiEcchi
Themes: Adult CastAdult Cast, Otaku CultureOtaku Culture, WorkplaceWorkplace
Duration: 23 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 7.261 (scored by 157530157,530 users)
1 indicates a weighted score.
Ranked: #29242
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #697
Members: 343,810
Favorites: 1,810

Available At


Streaming Platforms

Ranked #2924Popularity #697Members 343,810
Add to My List
Episodes: /12


Itsuki Hashima is a light novelist obsessed with little sisters, strictly focusing on them when he writes his stories. Despite his personality, he is surrounded by a tight circle of friends: Nayuta Kani, a genius yet perverted novelist who is in love with him; Haruto Fuwa, a fellow male author whose work has seen considerable success; Miyako Shirakawa, a good friend that he met in college; and Chihiro, his perfect younger step-brother who takes care of the housework and cooking.

Together, they play strange games, go on spontaneous journeys, crack silly jokes, and celebrate each other's successes. However, each individual must also deal with their own issues, whether it is struggling to meet a deadline or coming to terms with traumatic events buried in their past.

[Written by MAL Rewrite]

Characters & Voice Actors


Cook, Justin
Herek, Samantha
Assistant Producer
Oonuma, Shin
Tamamura, Jin
Director, Episode Director, Storyboard


Opening Theme

Apple Music
Amazon Music
Youtube Music
"Ashita no Kimi sae Ireba Ii. (明日の君さえいればいい。)" by ChouCho

Ending Theme

1: "Donna Hoshizora yori mo, Donna Omoide yori mo (どんな星空よりも、どんな思い出よりも)" by Aira Yuuki (eps 1-3, 5-8, 10-12)
2: "Dairokkan no Mistress (第六感のミストレス)" by Manami Numakura (eps 4)
3: "Innocent Lovely (イノセント・ラブリー)" by Akane Fujita (eps 9)

Episode Videos


Apr 18, 2024
Oh boy an anime about a guy who has a little sister fetish. Oh god what do I say. It was actually pretty good. The characters were interesting the story was fun the humor was really funny. Also the main heroine's dub voice actress was Rias So I may be a little biased.

It follows a group of drop out college kids who are LN writers. As you can guess the MC writes stories where the heroine is the little sister. Funny enough his love interest isn’t a little sister so I am ok with it (its not like that one anime where the ...
Mar 20, 2023
Mixed Feelings
A lot of people say that the first 5 minutes of the show is not indicative of the full show and while that's mostly true in regards to directness of the content, the MC still fetishizes little sisters throughout the entire show, so you have to be prepared for that regardless of those first 5 minutes. For that reason, I have mixed feelings.

As a story about the LN authors and the world they live in, the show is fun and interesting. But the little sister stuff doesn't work for me, as well as the relationship between MC and the girl that loves him. They have ...
Apr 2, 2024
The show had potential with some of the deeper content but it felt like panning through mud for gold and only coming up with a few specs that aren't even worth anything. The characters are not good. Most of them are creepy or downright criminal, with several of them being guilty of SA, which just gets brushed off as if it's normal to strip strangers clothes off on the street because you want to see their naked body, or downright R-ping other characters to get them to agree with you. These examples sound extreme but they are things that actually happened in the show. There ...

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