"Utsuro no Hako to Zero no Maria" ("空ろの箱と零のマリア", Box of Void and Maria of Zero) is a light novel series written by Mikage Eiji and illustrated by Tetsuo (Tashirosu).
Characters
- Hoshino Kazuki (protagonist)
- Otonashi Maria
- Kirino Kokone
- Oomine Daiya
- Usui Haruaki
- Mogi Kasumi
- Zero (Utsuro No Hako)
