Yu Hibari has two light novel series in active adaptation: the Oh Boy, Was I Wrong About Her anime premieres July 6, and the Kokō Na Kanojo to, Kanojo no Heya de Shiteru Koto manga launches June 27.
Yu Hibari is the author of two light novel series that are both receiving adaptations in mid-2026. The first, Oh Boy, Was I Wrong About Her, is a romantic comedy about a childhood friend whose gender reveal drives the premise. Its television anime adaptation will debut on July 6 at 11:30 p.m. on TV Tokyo. Crunchyroll will stream the series. The second promotional video and key visual for the anime also confirmed that the duo harmoe performs the ending theme song "Tilt."
The second series, Kokō Na Kanojo to, Kanojo no Heya de Shiteru Koto, follows two introverts-Kotori Nabata and Takumi Hashio-who share a secret routine of using physical contact as social training. The July issue of Kadokawa's Comic Alive magazine announced that the light novel will receive a manga adaptation by Mugiko. The manga is set to launch in the magazine's next issue on June 27.
Both adaptations were announced within weeks of each other, placing two of Hibari's works in concurrent production. The anime for Oh Boy, Was I Wrong About Her is the more prominent of the two, with a confirmed broadcast and streaming plan, while the Kokō Na Kanojo to, Kanojo no Heya de Shiteru Koto manga represents a smaller-scale expansion of that series. No further projects or updates beyond these two adaptations have been reported.
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The television anime adaptation of Yu Hibari and Siso's light novel series Oh Boy, Was I Wrong About Her will premiere on July 6 at 11:30 p.m. on TV Tokyo. The second promotional video and key visual also revealed that the duo harmoe performs the ending theme song "Tilt." Crunchyroll will stream the series.
The July issue of Kadokawa's Comic Alive magazine announced that Yu Hibari's light novel Kokō na Kanojo to, Kanojo no Heya de Shiteru Koto is getting a manga adaptation by Mugiko. The manga will launch in the magazine's next issue on June 27. The story follows opposites Kotori Nabata and Takumi Hashio, who share a secret routine.