hear me out on big brother x little brother where the resemblance is so strong they’re constantly asked if they’re twins.
hmmm little bro secretly in love with his older brother to a sickening degree. big bro graduating high school around the time little bro is starting and little bro is told at every turn how much he resembles big bro which just has him hard in chemistry trying to keep his crotch to the table so no one finds out that the teacher telling him that he was worried big bro got held back a few grades gave him a stiffy.
little bro is able to make it through the day as agonizing as it is and immediately runs upstairs without greeting his parents to his older brother’s room. since big bro is taking a gap year he’s somewhere across town having a nice time with his friends while little bro is searching his laundry hamper for a pair of his boxers just to stuff them in his pocket and cross the hallway to the bathroom and silently lock the door behind him.
their parents are downstairs shaking their head on how their youngest must be swamped with homework and studying upstairs while little bro is desperately fucking his fist with his older brother’s boxers stuffed in his mouth and staring at himself in the mirror, making a show of furrowing his brows and rolling his eyes back just to get a glimpse of what his older brother would look like jerking off.
(+bonus with big brother being out of the house so much, little brother uses his room to jerk off and fuck himself in. fucking himself on his bed with his freshly worn t-shirt over his face just to be engulfed by his smell, fucking himself on the floor just because it’s dirty and it makes him hot. even better he finds big bro’s fleshlight and fucks it and comes harder than anything before freaking out because he wasn’t sure if it was clean or dirty before he used it and now big bro’s gonna find out someone used his toy!)