Cast & crew
Quartet · Season 1
Nobody is recorded for this season on its own, so this is the whole show's cast.
Directed by Kenichiro Nishiumi
Cast
| Sachiko Fukumoto | Koharu / Osan |
| Toshiya Nagasawa | Gishirō Tsukamoto |
| Yuya Matsushita | Takeru Shiba |
| Saki Fukuda | Shun Namiki |
| Takaya Kamikawa | Kuchinawa |
| Natsuna Watanabe | Kasumi Akimoto |
Crew
| Yuya Matsushita | Theme Song Performance |
| Kenichiro Nishiumi | Director |