にやま has written at least 6 books. Their most popular book is 君の隣で揺られて with 2 saves with an average rating of 5⭐.
Series
3 primary books僕のおまわりさん / Boku no omawarisan is a 3-book series with 3 primary works first released in 2019 with contributions by にやま and Niyama.