Rule 34 Dev - 2boys abs amber_eyes artist_name atsumu_miya balls ballsack blonde_hair brother brother/brother brothers dangling_testicles dialogue erection foreskin foreskin_folds frottage gay gay_sex grey_eyes grey_hair haikyuu!! human incest intact kaito_draws kinktober low_hanging_balls male male/male male_focus male_nipples male_only muscles muscular_arms muscular_male osamu_miya pants_down pecs penis penis_out penis_through_leghole retracted_foreskin scrotum serratus serratus_anterior shorts shorts_down sitting smooth_skinned_male testicles topless twincest twins uncut undercut v-line veiny_penis yaoi|9748194544