Hayato Kirishima
main character
TV
6.8
My TrackerPLANNING
Episode: 0 / 12
My Score:
Anime DetailsFINISHED
Estimated watch time
4h 48m
⚡ 3 days at 5 eps/day
Tags & Tropes
Female Protagonist91%Male Protagonist88%Heterosexual82%Female Harem79%Tomboy70%School68%Time Skip48%Coming of Age40%College33%Horticulture26%
TVFINISHED2026 SUMMER6.8 / 10 AniList score
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• Tenkousaki no Seiso Karen na Bishoujo ga, Mukashi Danshi to Omotte Issho ni Asonda Osananajimi datta Ken
Synopsis & Story
Seven years after making a childhood promise to always be friends, Hayato is reunited with his formerly tomboyish pal Haruki at a city high school–only now, Haruki has transformed into the girl every guy dreams about! While Haruki’s looks may have changed, with Hayato, she’s still the same pal he remembers. Despite years apart, their promise and feelings remain and deepen into something stronger. (Source: Crunchyroll)
Trailer
Watch on YouTubeWhere to Watch Officially
Availability, audio and subtitles vary by region and service.
Featured Cast & Voice Actors
Franchise Universe & Related Entries
Aniphoria guide
Oh Boy, Was I Wrong About Her: should you watch it?
At a glance
Oh Boy, Was I Wrong About Her has been met with mixed reactions, with an average AniList score of 68/100 — 34% of 7,342 ratings are 8/10 or higher.
It ranks #59 most popular anime of 2026, and #22 most popular anime of Summer 2026 on AniList.
Of the 27.3K AniList users who started it, 6.4% dropped it, so it is dropped at a typical rate; 11.4K have finished it.
At about 4 h 48 min in total, it is a short commitment — a weekend binge.
Best for viewers who enjoy Comedy, Romance — especially female protagonist, male protagonist, heterosexual, female harem.
Episodes
12 episodes are listed.
Main cast & creators
- Original creator
- Yu Hibari
- Director
- Chuanfeng Xu
- Series composition
- Hitomi Mieno
- Character design
- N Nei Kurahashi
- Music
- Ryousuke Nakanishi
- Music
- Yuri Morita
- Music
- Naoki Tani
Opening & ending themes
Openings
- OP1“Natsu ni Kasanete” by DIALOGUE+ · eps 1-
Endings
- ED1“Tilt” by harmoe · eps 1-
Theme data from AnimeThemes.moe.
Oh Boy, Was I Wrong About Her FAQ
- How many episodes does Oh Boy, Was I Wrong About Her have?
- Oh Boy, Was I Wrong About Her has 12 episodes of about 24 minutes each, roughly 4 h 48 min in total.
- How long does it take to watch Oh Boy, Was I Wrong About Her?
- About 4 h 48 min back to back. At two episodes a day it takes 6 days; at one hour a day, about 5 days.
- Is Oh Boy, Was I Wrong About Her finished?
- Yes. Oh Boy, Was I Wrong About Her has finished airing — the final episode aired September 21, 2026.
- Is there a season 2 of Oh Boy, Was I Wrong About Her?
- No sequel is listed for Oh Boy, Was I Wrong About Her as of October 2026. You can continue the story in the original light novel.
- Is Oh Boy, Was I Wrong About Her based on a light novel?
- Yes. Oh Boy, Was I Wrong About Her adapts the light novel by Yu Hibari.
- Who animated Oh Boy, Was I Wrong About Her?
- Oh Boy, Was I Wrong About Her was animated by project No.9 and directed by Chuanfeng Xu.
- Who sings the opening of Oh Boy, Was I Wrong About Her?
- The opening, "Natsu ni Kasanete", is performed by DIALOGUE+.
- Where can I watch Oh Boy, Was I Wrong About Her?
- Oh Boy, Was I Wrong About Her is listed on Crunchyroll. Availability varies by region — check the streaming links on this page.