Room 303

Yukimaru and his friends investigate the Shiroyashiki as they look for their missing friends and run into the strange Room 303.
Alternative: Room Sanmmarusan, Room Three-o-Three, ルームサンマルサン
Release: 2008
Authors: Daisuke ASHIHARA
Artists: Daisuke ASHIHARA
Tag(s): Adventure, Mystery, One Shot, Psychological, Shounen, Supernatural