The Night Beyond The Tricornered Window Vol. 7

In Vol. 7, in order to rescue Erika from the dark cult that is the source of the curse, Kosuke and Rihito finally decide to confront Sensei and form a cooperative relationship with Keita, Sakaki, and Hanzawa. But in order to infiltrate Sensei’s house, they’ll have to get creative!
Notice: This book is written in Japanese.