Oh Boy, Was I Wrong About Her
Japanese light novel series
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Oh Boy, Was I Wrong About Her[a] is a Japanese romantic comedy light novel series written by Yu Hibari and illustrated by Shiso. It began serialization online in June 2020 on the user-generated novel publishing website Shōsetsuka ni Narō, before later acquired and published by Kadokawa Shoten under their Kadokawa Sneaker Bunko imprint since February 2021. A manga adaptation with art by Kina Ōyama was serialized online by Fujimi Shobo via Niconico Seiga website as part of the Dra Dra Flat brand from September 2021 to June 2025, and was collected in seven tankōbon volumes. An anime television series adaptation produced by Project No.9 premiered in July 2026.
| Oh Boy, Was I Wrong About Her | |
First light novel volume cover | |
| 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 (Tenkō-saki no Seiso Karen na Bishōjo ga, Mukashi Danshi to Omotte Issho ni Asonda Osananajimi Datta Ken) | |
|---|---|
| Genre | Romantic comedy[1] |
| Novel series | |
| Written by | Yu Hibari |
| Published by | Shōsetsuka ni Narō |
| Original run | June 13, 2020 – present |
| Light novel | |
| Written by | Yu Hibari |
| Illustrated by | Shiso |
| Published by | Kadokawa Shoten |
| Imprint | Kadokawa Sneaker Bunko |
| Original run | February 27, 2021 – present |
| Volumes | 9 |
| Manga | |
| Written by | Yu Hibari |
| Illustrated by | Kina Ōyama |
| Published by | Fujimi Shobo |
| Magazine | Niconico Seiga (Dra Dra Flat) |
| Original run | September 2, 2021 – June 26, 2025 |
| Volumes | 7 |
| Anime television series | |
| Directed by | Xu Chuan Feng |
| Written by | Deko Akao |
| Music by |
|
| Studio | Project No.9 |
| Licensed by | Crunchyroll |
| Original network | Tokyo MX, SUN, BS Fuji |
| Original run | July 6, 2026 – present |
| Episodes | 2 |
Plot
Hayato Kirishima and Haruki Nikaido were close childhood friends who lived in a rural town. However, they separated after Haruki moved away. Seven years later, Hayato now finds himself in the city where Haruki moved to and transfers to a new school. There, he meets a beautiful girl , who initially acts strange towards him. However, they quickly realize that she is Haruki, his old friend. The two quickly reconnect and start a relationship.
Characters
- Hayato Kirishima (霧島隼人, Kirishima Hayato)
- Voiced by: Ryōta Ōsaka (voice drama),[2] Shun'ichi Toki (anime)[3]
- A high school student who has just transferred to Haruki's school. Seven years ago, before Haruki moved away, the two promised to always be together, but the two lost contact and did not meet again until their reunion. He develops a crush on Haruki shortly after their reunion, and tends to get slightly jealous whenever other boys flirt with her.
- Haruki Nikaido (二階堂春希, Nikaidō Haruki)
- Voiced by: Rikako Aida (voice drama),[2] Ikumi Hasegawa (anime)[4]
- Hayato's childhood friend. During their reunion, Hayato did not recognize her as the Haruki of their childhood had a tomboyish appearance. She has now become a beautiful and popular girl. She still has the GameCube they used to play with when they were younger.
- Himeko Kirishima (霧島姫子, Kirishima Himeko)
- Voiced by: Miharu Hanai[3]
- Minamo Mitake (三岳みなも, Mitake Minamo)
- Voiced by: Natsumi Haruse[3]
- Saki Murao (村尾沙紀, Murao Saki)
- Voiced by: Fūka Izumi[3]
Media
Light novels
Written by Yu Hibari, Oh Boy, Was I Wrong About Her began serialization online on the user-generated novel publishing website Shōsetsuka ni Narō on June 13, 2020. The series was later acquired and published by Kadokawa Shoten as a light novel with illustrations by Shiso since February 27, 2021. Eleven volumes have been released as of July 2026.[5]
| No. | Release date | ISBN |
|---|---|---|
| 1 | February 27, 2021[6] | 978-4-04-111045-4 |
| 2 | July 1, 2021[7] | 978-4-04-111046-1 |
| 3 | October 29, 2021[8] | 978-4-04-111957-0 |
| 4 | April 1, 2022[9] | 978-4-04-111958-7 |
| 5 | July 29, 2022[10] | 978-4-04-112785-8 |
| 6 | December 28, 2022[11] | 978-4-04-112786-5 |
| 7 | December 1, 2023[12] | 978-4-04-113650-8 |
| 8 | August 30, 2024[13] | 978-4-04-114976-8 |
| 9 | August 29, 2025[5] | 978-4-04-116447-1 |
| 10 | July 1, 2026[14] | 978-4-04-117506-4 |
| 11 | July 31, 2026[15] | 978-4-04-117597-2 |
Manga
A manga adaptation illustrated by Kina Ōyama was serialized by Fujimi Shobo on the Niconico Seiga website under the Dra Dra Flat brand from September 2, 2021, to June 26, 2025.[16] Seven tankōbon volumes were released from April 8, 2022, to July 9, 2025.[17][18]
| No. | Release date | ISBN |
|---|---|---|
| 1 | April 8, 2022[17] | 978-4-04-074501-5 |
| 2 | October 7, 2022[19] | 978-4-04-074715-6 |
| 3 | April 7, 2023[20] | 978-4-04-074936-5 |
| 4 | November 9, 2023[21] | 978-4-04-075195-5 |
| 5 | July 9, 2024[22] | 978-4-04-075521-2 |
| 6 | January 9, 2025[23] | 978-4-04-075521-2 |
| 7 | July 9, 2025[18] | 978-4-04-076010-0 |
Anime
An anime adaptation was announced during Kadokawa's "Sneaker Bunko 35th Anniversary Festa!" livestream on September 24, 2023,[1] which was later revealed to be a television series that is produced by Project No.9 and directed by Xu Chuan Feng, with Deko Akao handling the series composition, N-Nei Kurahashi designing the characters, and Ryosuke Nakanishi, Naoki Tani, and Yuri Morita composing the music. The series premiered on July 6, 2026, on Tokyo MX and other networks.[4][3] The opening theme song is "Natsu ni Kasanete" (夏に重ねて; Adding to Summer), performed by Dialogue+,[24] while the ending theme song is "Tilt" performed by Harmoe.[25] Crunchyroll is streaming the series.[26]
Episodes
| No. | Title [27][28] | Directed by [b] | Written by [b] | Storyboarded by [b] | Original release date [29] |
|---|---|---|---|---|---|
| 1 | "Beginning with a Summer Day" Transliteration: "Hajimari no, Natsu no Hi" (Japanese: 始まりの、夏の日) | Yū Hibikiba | Deko Akao | Xu Chuan Feng | July 6, 2026 |
| 2 | "I Really Suck at Girl Talk" Transliteration: "Koibana wa, Nigate da" (Japanese: 恋バナは、苦手だ) | Keisuke Gōda | Deko Akao | Keisuke Gōda | July 13, 2026 |
See also
- The World's Least Interesting Master Swordsman, another light novel series with the same illustrator
Notes
- Production staff information is taken from the ending credits of each episode.