The Guy She Was Interested In Wasn't A Guy at All Anime Premieres January 8
First promo video confirms new cast and staff, plus Nirvana's 1991 song "Breed" as the opening theme.
The first promotional video for the anime adaptation of The Guy She Was Interested In Wasn't A Guy at All revealed additional cast and staff and confirmed a January 8 premiere date, according to Anime News Network.
The video also announced that the opening theme will be Nirvana's 1991 song "Breed."
Kadokawa Shoten publishes the manga in print, and Yen Press licensed it for English release; the third volume arrived in December 2025.
Background
Arai launched the manga on Twitter in April 2022 and began serializing it on pixiv Comic in April 2023. The series ranked #2 on the 23rd annual Da Vinci "Book of the Year" list and #2 for top manga for female readers in the 2024 edition of Takarajimasha's Kono Manga ga Sugoi! guidebook.
Quick answers
When does The Guy She Was Interested In Wasn't A Guy at All anime premiere?
The anime premieres on January 8, as announced in its first promotional video.
What is the opening theme song?
The opening theme is Nirvana's 1991 song "Breed."