He is Tomodachi (Volume 1-7 is the latest issue)

Publisher: Kodansha
Author: Lee Yoshioka
Size: 112mm x 174mm
Number of books: 7
Language: Japanese
Category: Girl manga, manga
Latest publication date: 2010-03-12

Synopsis:
The middle three Hiyori is in unrequited love in Mizuno in the next class. At that time, I learned that Sasamoto, who was next to me, was a childhood friend with Mizuno, and asked for cooperation. However, Sasamoto, who should have been a friend, is gradually worried ...!? School Love Series starting with zero