星野源

Senpai (voice)

花澤香菜

The Girl with Black Hair (voice)

小清水亜美

Naoko (voice)

悠木碧

Princess Daruma (voice)

神谷浩史

Director of School Festival Operations (voice)

本多力

Bookstore Shopkeeper Gabi (voice)

吉野裕行

God of the Old Books Market (voice)

諏訪部順一

Nise-Jōgasaki (voice)

山路和弘

Todo (voice)