My Friend's Little Sister Has It In for Me!
友達の妹が俺にだけウザい (Tomodachi no Imouto ga Ore ni dake Uzai)
- Comedy
- Romance
- School
- Episodes
- 12
- Duration
- 23 min per ep
- Aired
- Oct 5, 2025 to Dec 21, 2025
- Status
- Finished Airing
Synopsis
Akiteru Ooboshi runs on a single rule: everything should be done as efficiently as possible. As producer of the 05th Floor Alliance—an apartment-based game development circle—he helps launch their newest game, *The Night the Black Goat Screamed*, only for it to blow past a million downloads. Looking to secure the group’s future, Akiteru seeks support from Honeyplace Works, a major company headed by his uncle, Makoto Tsukinomori.
The offer comes with an unexpected catch: to earn the partnership, Akiteru must pretend to be the boyfriend of his cousin, Mashiro. He accepts without hesitation, treating it as the most practical option for the team. But the arrangement complicates his daily life even further thanks to Iroha Kohinata—his best friend Ozuma’s little sister—who delights in teasing him and cracking his carefully maintained composure as work, school, and relationships start to overlap.
Otaku Consensus
Otaku Den’s verdict: My Friend's Little Sister Has It In for Me! lands as a deliberately noisy 2025 rom-com whose best asset is Kazuomi Koga’s brisk comic timing and Touko Machida’s ability to keep the school, work, and fake-dating threads moving across a tight 12-episode run. The reception sits in guilty-pleasure territory, with an 8/10 enthusiast review on one side and MAL/AniList scores around the mid-6 range on the other; the most repeated criticism is that Iroha’s teasing dynamic can feel more obnoxious than charming for viewers tired of classic harem and tsundere machinery. Its strongest material is the midseason Mashiro-focused stretch around episode 6, where the show briefly trades pure provocation for context about social fallout and school pressure.
Why You Should Watch
Watch this if you want a rom-com that treats romantic chaos like project management: deadlines, alliances, acting, reputation control, and emotional collateral all collide instead of sitting in separate genre boxes. It scratches a similar itch to the verbal sparring side of Don't Toy with Me, Miss Nagatoro and the strategic relationship games of Nisekoi, but with a stronger otaku-industry angle through game development and workplace negotiation. The ideal viewer is someone who enjoys loud teasing heroines, fake-relationship complications, and love-triangle tension without needing the series to reinvent the genre. If you dislike abrasive banter, this will test you early; if you like watching a hyper-rational protagonist get dismantled by people who refuse to follow his logic, the comedy has a clear target.
Key Characters
- AAkiteru Ooboshi
Akiteru is the kind of efficiency-obsessed rom-com lead fans either find refreshingly goal-oriented or hilariously doomed because every personal interaction becomes a system he thinks he can optimize.
- IIroha Kohinata
Iroha is the show’s pressure point: her relentless teasing drives the comedy, the fan debates, and the divide between viewers who see her as magnetic chaos and those who find her exhausting.
- MMashiro
Mashiro gives the series its sharper romantic complication, especially once the anime shifts from surface coldness into the school-history material highlighted around episode 6.
- OOzuma
Ozuma matters less as a gag machine than as the social bridge that makes Iroha’s presence in Akiteru’s life feel inescapable rather than coincidental.
What Makes It Stand Out
- 1
Studio Blade handled the 12-episode TV adaptation, giving the show a compact seasonal structure that aired from October 5 to December 21, 2025 rather than stretching the romantic setup across multiple cours.
- 2
The production pairs director Kazuomi Koga with series composer Touko Machida, a combination that emphasizes rapid scene turnover and keeps the comedy built around interruptions, verbal pressure, and social misfires.
- 3
AniList’s tag profile is unusually revealing for a school rom-com: Fake Relationship sits at 75%, Female Harem at 71%, Software Development and Otaku Culture both at 65%, and Work at 64%, marking it as more industry-adjacent than a standard classroom-only teasing comedy.
- 4
Episode 6, identified in web listings as the mall episode involving Mashiro and Iroha, is the clearest tonal pivot point because it connects the romantic triangle to Mashiro’s prior school trouble rather than relying only on banter.
- 5
The anime’s public reception forms a clear split: MAL lists it at 6.49 from 33,658 votes with a popularity rank of #2170, while enthusiast reviews frame it as an 8/10 guilty pleasure built for viewers who enjoy chaotic rom-com tropes.
Fun Facts & Trivia
- Fun fact 1
- The original story is credited to Ghost Mikawa, with Tomari credited for the original character design, while the anime’s character designs were adapted for television by Katsuyuki Satou.
- Fun fact 2
- The show’s visual pipeline lists Kazunori Ozawa as Visual Director, Hisae Arimoto as Art Director, Erina Ishihara on Art Design, Mika Funabashi on Color Design, and Atsushi Kanou as Director of Photography.
- Fun fact 3
- AniList records the series at 64/100 with 687 favourites, closely mirroring the mixed-but-watchable verdict seen in MAL’s 6.49 score and IMDb’s 6.2 listing.
- Fun fact 4
- Crunchyroll’s episode listing foregrounded the teasing hook from the start with episode titles such as “My Friend's Little Sister Has It In for Me” and “The Cousin I Haven't Seen in Years Is Cold to Me.”
- Fun fact 5
- Despite being categorized mainly as Comedy and Romance, AniList also tags the series with Acting at 65%, Bullying at 60%, and even Guns and War above 50%, reflecting the way its in-universe game-development material bleeds into the show’s metadata.
Studios
- Blade
