Oh Boy, Was I Wrong About Her

転校先の清楚可憐な美少女が、昔男子と思って一緒に遊んだ幼馴染だった件 (Tenkou-saki no Seiso Karen na Bishoujo ga, Mukashi Danshi to Omotte Issho ni Asonda Osananajimi Datta Ken)

7.0(7,194)

MAL Score

Ranked #5132

Popularity #3439

Comedy
Romance
School

Episodes: 12
Duration: 24 min per ep
Aired: Jul 6, 2026 to Sep 21, 2026
Status: Currently Airing

Synopsis

Reuniting with a childhood friend can be a transformative experience, especially when that friend has blossomed into a radiant and graceful young woman. In the serene countryside, Hayato is taken aback when he encounters Haruki after many years apart. Gone is the mischievous boy he once knew; instead, he finds himself face-to-face with someone who embodies innocence and beauty.

However, beneath Haruki's polished exterior lies a familiar spark. In moments of camaraderie, she sheds her refined demeanor, revealing the playful spirit they once shared. Their bond, rooted in carefree days of mud-slinging adventures, remains unbroken as they navigate the complexities of adolescence together, bringing a blend of humor and warmth to their evolving relationship.

Otaku Consensus

Early reception is solid rather than breakout: a 7.12 MAL average from 2,950 votes and a 70/100 AniList score point to a rom-com that is connecting with its target audience without becoming a seasonal phenomenon. What works is the clean two-lead focus, Project No.9’s comfortable school-romance packaging, and Hitomi Mieno’s series composition built around a clear emotional throughline; the recurring limitation is that its familiar childhood-friend setup has not yet shaken off a sense of predictability.

Why You Should Watch

Watch this if you want a childhood-friend romance that leans into gender presentation, tomboy energy, and adolescent self-consciousness without turning into harem bookkeeping or melodramatic triangle math. It scratches a similar itch to Tomo-chan Is a Girl! in the way it plays with the gap between how a girl is perceived and how she actually behaves, while its gentler school atmosphere puts it closer to the low-friction appeal of Horimiya than to louder gag comedies. The appeal is concentrated: two main characters, a 12-episode run, comedy-romance pacing, and a lead pair voiced by Shunichi Toki and Ikumi Hasegawa. The AniList tags also hint at more texture than the average classroom rom-com, with horticulture and agriculture elements sitting alongside the school setting.

Key Characters

H
Hayato Kirishima(VA: Shunichi Toki)
Hayato is the audience’s anchor for the show’s central misread, and his appeal comes from how quickly ordinary school-romance reactions turn into awkward recalibration.
H
Haruki Nikaidou(VA: Ikumi Hasegawa)
Haruki is the draw: AniList’s Tomboy tag at 67% reflects how fans frame her as a character whose polish and rough-edged familiarity are both essential to her charm.

What Makes It Stand Out

1
Project No.9 is producing the anime as a 12-episode school rom-com, a format that keeps the focus on the central pair rather than expanding into a large ensemble structure.
2
The creative package pairs director Chuanfeng Xu with series composer Hitomi Mieno, giving the adaptation a clear division between episode direction and long-form romantic pacing.
3
The music is credited to three composers: Ryousuke Nakanishi, Yuri Morita, and Naoki Tani, an unusually broad music team for a compact two-lead comedy romance.
4
AniList’s tag spread is more specific than a standard school-romance listing: Male Protagonist, Female Protagonist, Tomboy, Time Skip, Coming of Age, Horticulture, and Agriculture all appear in the metadata.
5
DIALOGUE+ performs the opening theme, tying the show to a voice-actress idol unit strongly associated with bright, character-forward anime songs.

Fun Facts & Trivia

Fun fact 1: The anime is credited to Yu Hibari for the original story and Sisoe for the original illustration, separating narrative authorship from the visual identity of the source.
Fun fact 2: Character design is handled by N Nei Kurahashi, making the contrast between refined presentation and tomboy-coded body language a key production responsibility rather than just a writing device.
Fun fact 3: Daiki Yamaki serves as sound director, while the score is split among Ryousuke Nakanishi, Yuri Morita, and Naoki Tani.
Fun fact 4: On AniList, the series has 215 favourites despite still airing, showing a small but committed early fanbase beyond its broader 70/100 score.
Fun fact 5: The show premiered on July 6, 2026, and is listed as currently airing, so its MAL rank and score are still based on an early-vote sample rather than a completed-season consensus.