Happy Days Creation!

Happy Days Creation! is sung by IDOLiSH7 and Re:vale's voice actors, Toshiki Masuda as Iori Izumi, Yusuke Shirai  as Yamato Nikaido, Tsubasa Yonaga  as Mitsuki Izumi, KENN  as Tamaki Yotsuba, Atsushi Abe  as Sogo Osaka, Takuya Eguchi  as Nagi Rokuya, Kensho Ono  as Riku Nanase, Soichiro Hoshi  as Momo and Shinnosuke Tachibana  as Yuki. The song lyrics were written by, and the song was composed by.

Happy Days Creation! was originally released within the game on January 27, 2018. It becomes available in normal lives after clearing Part 3 Chapter 18.1. Happy Days Creation! was later released on April 7, 2021, as part of the Collection Album vol.2.