HEHE, I LOVE IT A LOT!!! both ways! 🤣 i prefer if it's rui, so i hope i can talk about that since it's on my mind!
just imagine.. rui who's been rejected his entire life, and people who have difficulties trusting him... he thinks of tsukasa as his star, but he's so afraid of losing him that it makes him sick to his stomach. he's so beautiful, he's handsome, he's everything to him. one night during a sleepover, he's restless, but when he opens his eyes and sees the boy sleeping beside him, he just can't help but feel a sense of ease. tsukasa-kun is truly relieving to his heart like that, you see?
he gets on top of him and starts pressing kisses against tsukasa's face. he thinks it'll wake him up but to his surprise, tsukasa doesn't. kisses becomes licks become him pressing his mouth against tsukasa's collarbone as he's pushing their pants down and making tender love to each other... even in sleep, tsukasa mutters rui's name with affection. the two of them finish and immediately, a sense of dread washes over rui: he basically raped him, didn't he? oh, god. he was so bad. he was terrible. but before he can go down under, tsukasa wakes up and asks him what's wrong.
he immediately realizes somethings going on down there, and when he feels his pussy, he realizes that he was just used. rui starts to profusely apologize, but tsukasa shuts him up with a kiss and tells him it's fine. they talk quietly about rui's insecurities, his nightmares, and the night ends with them making tender love again, this time with tsukasa-kun awake 🥰