The Past
Eriru
Sakiya, Kousuke
Mitsumine, Hakuya
Mitsuki, Tarou
Sara
Mimi
Coco
Maria
Noel
Touin, Rina
Gaito
Doumoto, Kaito
Suetsugi, Konoha
Nanami, Lucia
Yuuri
Meru
Caren
Izuru
SheShe
Houshou, Hanon
Hippo
Nikora
Regina, Aqua
Taki
Homeroom teacher
Aurisumaris
Makoto
Kashima, Nadeshiko
Yonomori, Akane
Yonomori, Kobeni
Momouchi, Mayura
Mitsumine, Shirayuki
Yonomori, Benio
Mitsumine, Mashiro
Math teacher
Oono, Niko