This is Green Wood [Bunko Version] (Volume 1-6)

Publisher: Hakusensha
Author: Yukie Nishu
Size: 105mm x 148mm
Number of books: 6
Language: Japanese
Category: Girl manga, comic library, manga
Latest publication date: 2001-06-14

Synopsis:
Kazuya Hasukawa suffered from gastric ulcers and entered high school one month later. Kazuya's school life, who has become a dormitory in the Green Rin Dormitory (commonly known as "Green Wood"), which is rumored to be the "Nest of Weirdo", is difficult!?