Mystari's manga / #Incest(42)

Ch 1-2 The son of a distinguished family, Kazuki has always been treated differently, even though he considers himself a good-for-nothing son. But five years ago when his father remarried, Kazuki got a new older brother. Souya was very talented and kind, which eventually led Kazuki to leave home to escape his feelings. But one day Souya comes looking for him.

Touma, the ever indifferent adoptive brother, is hurt by Tetsuo's relationship with an older man. Seeing him in tears, Touma realizes his feelings for his brother. But having lost his parents at an early age and been taken in by his kind adoptive parents, this desire feels like a betrayal to his precious family, and is a torture which prevents Touma from moving forward.