Kotoyama has written at least 13 books. Their most popular book is Call of the Night, Vol. 1 with 3 saves with an average rating of 3⭐.
Series
14 primary booksAuthored 93% of series
Call of the Night is a 14-book series with 14 primary works first released in 2019 with contributions by Kotoyama, Kotoyama,, and コトヤマ.