Gen Hoshino

as Senpai (voice)

Kana Hanazawa

as The Girl with Black Hair (voice)

Ami Koshimizu

as Naoko (voice)

Aoi Yuuki

as Princess Daruma (voice)

Hiroshi Kamiya

as Director of School Festival Operations (voice)

Chikara Honda

as Bookstore Shopkeeper Gabi (voice)

Hiroyuki Yoshino

as God of the Old Books Market (voice)

Junichi Suwabe

as Nise-Jōgasaki (voice)