Kotoyama has written at least 17 books. Their most popular book is Call of the Night, Vol. 1 with 11 saves with an average rating of 3.57⭐.
Series
17 primary books14 released booksAuthored 93% of series
Call of the Night is a 14-book series with 14 released primary works first released in 2019 with contributions by Kotoyama and コトヤマ.