Brother and Kyoko started dating in HS.
She became Brother couch, but for some reason she isnt competing herself.
During college, brother ditched running despite the expectations of everyone.
Kyoko is really into femdom, orgasm denial and exhibicionism.
Brother and Kyoko dont even talk to each other anymore.
Did they... get married out of HS she turned to be kinky and overbering and Brother just ran away?
MC is just holding this over his inferiority complex over his Brother