Jun Fukuyama : Yūta Tog:hi
Maaya Uchida : Rikka Takan:hi

Azumi Asakura : Kumin Tsuyuri
Chinatsu Ak:aki : Shinka Nibutani
Eri Sendai : Toka Takan:hi
Kaori Fukuhara : Kuzuha Tog:hi
Kikuko Inoue : Nan:e Tsukumo
Mami Shitara : Yumeha Tog:hi
Souichiro Hoshi : Makoto Isshiki
Sumire Uesaka : Sanae Dekomori
Yuri Amano : Yuuta's Mom

Aki Nakajima : Student A (ep 10)
Daisuke Matsuo : Teacher (ep 5)
Eimi Okada : Student B (ep 10)
Hiroshi Kar:uda :
Mera (ep 6)
Quiz Teacher (ep 4)
Salaryman (train station; ep 1)
Student (eps 6, 10)
Teacher
Theatre Club Member (wearing gl:ses; eps 3, 6)
Hiroshi Naka : Rikka's Grandfather (eps 7, 12)
Houchu Ohtsuka : Narrator (eps 1, 12)
Junko Iwao : Rikka's Mother (eps 10, 12)
Juri Nagatsuma : Student (eps 1, 6, 11-12)
Kanae Oki :
Chimera (9 episodes)
Student (eps 1, 6, 10-12)
Keiko Otan:hi : Student (ep 6)
Manami Shirakawa :
Kazari "Wind Chime/Fuurin-chan" Kannagi (巫部 風鈴)
Student (eps 6, 11)
M:ahito Kawanago : Student C (ep 3)
Misaki Takah:hi : Student (ep 6)
Rieko Oda : Student (eps 3, 6, 11-12)
Sumako Nomura : Rikka's Grandmother (eps 7-8)
Toa Yukinari : Student A (ep 3)
Yui Shoji : Student B (ep 3)

Kanae Oki (ep 7)
Rieko Oda (ep 7)