NBCUniversal posted two trailers for the Just Because! original anime on Monday. The first video previews Yanagi Nagi's opening theme song "over and over," and the second video previews the ending theme song "behind" by Karin Isobe, Yuna Yoshino, and Lynn as their respective characters.

The anime will premiere in Japan on Thursday on AT-X (9:00 p.m.), Tokyo MX (11:30 p.m.), and TV Kanagawa (1:00 a.m., effectively October 6 morning). The show will also premiere on Friday on MBS (2:55 a.m., effectively Saturday morning), and on October 10 on BS Fuji (12:30 a.m., effectively October 11 morning). Sentai Filmworks licensed the anime and will stream it for the fall 2017 simulcast season on Anime Strike in the United States and on select digital outlets in other territories. The company is also planning a home video release.

Atsushi Kobayashi ( Girls & Panzer storyboards, episode director) is directing the anime at PINE JAM, with Hajime Kamoshida (The Pet Girl of Sakurasou) as the scriptwriter and Kiseki Himura (Sword Art Online: Progressive manga, Tawawa on Monday) as the original character designer. Hiroyuki Yoshii ( Tawawa on Monday ) is adapting the character designs for animation. Singer-songwriter Nagi Yanagi ( A Lull in the Sea , My Teen Romantic Comedy SNAFU , Bakemonogatari ) is credited as music producer and is also performing the opening theme song. The main female cast members, consisting of Karin Isobe, Yuna Yoshino, and Lynn, will perform the ending theme song as their respective characters.