A single-episode music video for the song "Natsu no Owari" by Natsu no Owari, sung by Yukari Yuzuki. Natsu no Owari and Haruyoshi Nagae share directing credit. The track first came out on the album End of Summer 6 on August 7, 2023. It was finished in March 2023 but kept being reworked while the video was made, so the version heard here differs from the album recording and counts as its own take, released as a tie-in single.