Room 309, also known as the Sweet Room (スイートルーム, Suītorūmu), is one of dorm rooms in Setouchi Keijo Training School.
It's rumored that this room is designated for those who barely passed the exam. Many students have lost their confidence and dropped out. It's also the closest room to the emergency exit. By the time Sayaka Miyata and Nozomi Kaminashi joined to the room, there are only two remaining residents, Kazane Aoba and Non Toyoguchi. Following the class exchange event, all of the residents have been promoted into the Elite Class.
| Nagisa Ujibe • Miku Kobayakawa • Hitomi Hokuto • Tsubasa Furukawa • Katou | ||
| Kyoko Shirayuki | ||
| Ai Fujisaki • Sumire Sakuragi | ||
| Suika Akamatsu | ||
| Amano | ||
| Yuko Oshima • Tanaka • Harumi Konishi • Kururu Nemoto • Shizuka Kimura • Rei Mikawa • Ai Shimada • Momo Horiuchi • Nana Gotsui | ||
| Mio Kusakai (Rank 1) • Rin Rokudo (Rank 2) • Hanabi Kawai (Rank 3) • Kotone Fujisaki (Rank 4) • Amano (Rank 5) • Saya Kogatana (Rank 6) • Atsuko Yoshida (Rank 7) • Mari Murata (Rank 8) • Usagi Tsukishita (Rank 9) • Yui (Rank 10) • Sayaka Miyata (Rank 11) • Nozomi Kaminashi (Rank 12) • Kazane Aoba (Rank 13) • Non Toyoguchi (Rank 14) | ||
| Masaru Okazaki • Masaru's Friend | ||
| Room 104 • Room 307 • Room 309 | ||
