Koimonogatari (TAGURA Tohru)

From koyukiya: Hasegawa Yuiji accidentally finds out that his classmate, Yoshinaga Yamato, is gay. Eventually, he realises Yamato's gaze is directed towards an unattainable love. From a study group together Yuiji finds out that Yamato is a "pretty nice guy," and despite his awkwardness, starts wishing for his happiness...