Sorairo Flutter(2009)

Sorairo Flutter

Outgoing high school student Noshiro finds himself drawn to Sanada, the school outcast, who is rumored to be gay. Rather than deter Noshiro, the rumor makes him even more determined to get close to Sanada, setting in motion a tale of first love.

Notes:
This is the original webcomic that was later adapted to the homonym manga.
Includes 3 extra chapters.