Teenage Blue

Teenage Blue by Eve was used as the ending theme for Ao no Hako (Blue Box), a romance and sports anime adapting the manga by Kouji Miura. The anime began airing in October 2024 as part of the Fall 2024 anime season, produced by TMS Entertainment's Telecom Animation Film studio. Eve is well known for other anime tie-ins including Kaikai Kitan, the opening theme for Jujutsu Kaisen.

Teenage Blue serves as the ending theme for Ao no Hako, playing during the credits at the end of each episode. The opening theme is a separate song by another artist. Eve's track captures the emotional, reflective tone that the series' romantic basketball storyline calls for in its closing moments.

Yes, an official music video for Teenage Blue was produced and released on Eve's YouTube channel, where Eve has amassed millions of subscribers through previous viral hits. The video features Eve's characteristic blend of stylized animation and atmospheric visuals. As with many of Eve's music videos, it serves as both a standalone promotional piece and a tie-in to the Ao no Hako anime.

Teenage Blue was released as a digital single tied to the Ao no Hako anime, and its availability is primarily through streaming platforms such as Spotify, Apple Music, and YouTube. Eve has released multiple full-length albums including Kaizin, Otogi, and Smile, and new anime-tie-in singles are often released ahead of being collected on a future album. Check Eve's official discography for the most current information on whether the track appears on a full album release.