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
Binge-ready
Finished airing — 12 episodes, ready to binge.
- Format
- TV
- Season
- Summer 2026
- Studio
- project No.9
- Based on
- Light novel
- Episode length
- 24 min
- Started
- 6 Jul 2026
- Ended
- 21 Sep 2026
- Score
- 68/100
Comedy Romance Female Protagonist Male Protagonist Heterosexual Female Harem Tomboy School
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)
Where to watch
Opening and ending songs
Song data from AnimeThemes.
Source material
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
Novel · Finished · 11 volumes · 2021–2026
Source: AniList and MangaDex (publication details only).
Credits, releases and news
Staff
- Director
- Chuan Feng Xu
- Original creator
- Yu Hibari
- Series Composition
- Deko Akao
- Character Design
- N-Nei Kurahashi
- Music
- Ryōsuke Nakanishi, Naoki Tani, Yuri Morita
- Art Director
- Miu Miyamoto
- Sound Director
- Daiki Hachimaki
Japanese voice cast
- Hayato Kirishima: Shunichi Toki
- Minamo Mitake: Natsumi Haruse
- Haruki Nikaidō: Ikumi Hasegawa
- Himeko Kirishima: Miharu Hanai
- Kazuki Kaidō: Genta Nakamura
- Saki Murao: Fūka Izumi
- Iori Mori: Kakeru Hatano
Latest news
- 21 Jun 2026 Crunchyroll India to Stream Black Torch, Dara-san of Reiwa, Kaiju Girl Caramelise, More Anime in Summer 2026
- 19 Jun 2026 'Oh Boy, Was I Wrong About Her' TV Anime's 2nd Promo Video Reveals July 6 Debut
- 17 Jun 2026 Crunchyroll Announces Release Schedule for Summer 2026 Season
- 8 Apr 2026 Tenbin Romantic Comedy Anime Presents Spring-Themed Teaser
- 28 Mar 2026 Tenbin Romantic Comedy Anime's Main Promo Video Reveals Opening Song
Episode titles (12)
- 1. Beginning with a Summer Day
- 2. I Really Suck at Girl Talk
- 3. Produced by Himeko
- 4. Small Hands, Broad Shoulders
- 5. Discipline, Young Maiden
- 6. What about Your Camouflage!?
- 7. You're Special
- 8. Where the Heart Is
- 9. Truly Special
- 10. We Are Friends, Right?
- 11. As Long As We're Together
- 12. A Fresh Start
Anime News Network readers rate it 6.53/10 (38 votes).
Source: Anime News Network. Full details at Anime News Network.
Main characters
-
Hayato Kirishima
霧島隼人
Voiced by Shunichi Toki
-
Haruki Nikaido
二階堂春希
Voiced by Ikumi Hasegawa
-
Himeko Kirishima
霧島姫子
Voiced by Miharu Hanai
-
Minamo Mitake
三岳みなも
Voiced by Natsumi Haruse
-
Saki Murao
村尾沙紀
Voiced by Fuuka Izumi
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Airing data from AniList. Last updated 25 Oct 2026.