In the Twilight of Our Adolescence 

A story about boys who grow from boys to adults during adolescence, and who worry, make mistakes, and gradually come to terms with the many facets of life. Tanahashi Yusei is a popular boy who excels in both academics and sports, and naturally has people gathering around him. Yusei has a classmate he admires, but he can't tell anyone about him. That person is Nakagawa, an inconspicuous boy who his friends don't even seem to notice. The two become closer after a certain incident... (Source: TOKYOPOP) Notes: - Originally released at J.GARDEN 52, was then licensed by Hero's for commercial release. - Includes one extra chapter.