Mundi Owo's manga / #Older seme x Younger uke(9)

1st couple: older seme x younger uke; the seme was the uke's big brother best friend; the seme had unrequited love with the uke; and the seme was ex-sensei tutored the seme of the 2nd couple 2nd couples: younger seme x older uke; step bros; the seme was ex-student tutored by the seme of the 1st couple which he had his unrequited love then