Tsuki no Ookami Otoko

Keiji and Keiichi are twins who both practice martial arts, though their appearances are gentle and unassuming. Keiji has long had affection for his older brother, Keiichi, which remains unreciprocated. When Keiji begins a one-sided relationship with a classmate, his emotions become complicated. Meanwhile, Keiichi also begins a relationship with someone else, altering the dynamic between the brothers.