ALBUM
STU48
2020
Lyrics for this song have yet to be released
瀬戸内の妹 (Setouchi no Imouto) off vocal ver. was produced by 秋元康 (Yasushi Akimoto).
STU48 released 瀬戸内の妹 (Setouchi no Imouto) off vocal ver. on Wed Jan 29 2020.