Riko Azuna, an anime song singer and singer-songwriter who debuted with the opening theme song "Touching You" for "Bloom Into You" and has since been responsible for the music of many TV anime such as "Made in Abyss", "Re:Zero - Starting Life in Another World", and "Astra Lost in Space", will release a new single "Rain, Then Rainbow". She wrote the lyrics and composed the music herself, and the arrangement was done by Yuki Nara. The refreshing band sound is the core of the guitar rock, and Azuna's light acoustic guitar sound is on top, making it a perfect number for the summer. The lyrics contain the message "After the tears, a rainbow appears" and Azuna's emotional, conversational vocals will surely give many listeners a push. Since it was first performed at her solo live in November last year, it has already become a familiar song at live shows, and fans have been eagerly awaiting its release. It also includes a sing-along where fans can sing together, and it is a song that we hope will get the whole venue excited at future live shows. The beautiful jacket design is once again an original illustration by the popular illustrator "Yoh."