Ah, the scent of forbidden love between two brothers... Or in this case, more like one-sided obsession by our adored freak, Rui. That kind of vibe is why I love JohnWen ritk a lot, and anon, idk if you we're going for that au while writing that idea, but I love them too much so I'll use them for this scenario.

Rui knows he's been in love with his beloved older brother for quite a while, yet he's been holding back from actually acting on those instincts, too afraid to taint his relationship with Tsukasa, and Tsukasa himself with those dirty, forbidden feelings.

Naturally, it gets harder and harder to control them as time goes by, his love and obsession only growing despite his best efforts to bury and hide them, and the straw that breaks the camel's back is the day Rui "accidentally" goes into the bathroom while Tsukasa is having a bath, and he finds his brother's used clothes hanging next to the door, his eyes immediately fixating on some cute white panties with frills and a little bow on the front. A dangerous thought flashes through his mind, and before he can't find the strength to resist it, those panties are already in his hands and he's running for dear life to his own room, locking himself in it once he's inside.

His breaths are quick and his face is red, not only from the adrenaline, but from knowing that in his trembling, sweaty hands it's something so intimate and precious, and that it belongs to his dear Tsukasa. It feels wrong, but the hormones in his teenage body don't care as he takes a sniff and immediately gets drunk on the smell of his brother's fresh scent. He can only imagine that delicate, tender pussy brushing against the soft cloth on his nose and it makes Rui get so damn hard. He's pumping his erection into his fist like mad and comes again and again with only the lovely smell of Tsukasa's body, and even if he feels so guilty after he finishes his reckless session, he keeps those panties for himself in his own room and uses them for countless times in the future. Poor Tsukasa will never know where his panties went after that bath...

PD: So sorry for the delay in a response. 😭😭😭