beta
Vol. 2 Ch. 4 (blood-related brothers)
blood-related brothers, (twins?)
Ch. 8+9 Blood-related Brothers;
the younger brother took up the studies his older brother abandoned so his older brother could do as he liked
Stepbrothers, who met each other by coincidence before
Ch. 3 (half-brothers) + Ch. 5 (half-brothers +s/m)
stepbrothers
stepbrothers
stepbrothers
Stepbrothers
Stepfather & son
Myuzu no Gakuen de Aou