Nothing really "mature" about this, right?
Whipped
He dreams about them every night, both Saki and Chie. It always starts with Sempai, dressed in white in the school hallway, and she says she'll forgive him if he closes his eyes. He always does, even though he's experienced the dream twenty times over. He can hear her soft laughter, and feels a gentle caress over his eyes. But then everything seems to morph and he can tell that Saki is gone from his dream, and a dark, towering silhouette is covering his eyes with a smirk on their face. And he's sitting on what feels like cold stone, and he begs for Saki to forgive him, despite the fact that he knows she's no longer there and probably doesn't care. The towering figure laughs at him in a familiar high-pitched voice that makes his skin crawl and his spine shiver, yet he enjoys the feeling.
Chie's Shadow sneers at him and remarks how pathetic he is as she leans in close enough that Yosuke can smell her. Of course, she smells like meat; like the dead, rotting corpses of all of her followers and slaves and stooges who fell for her spunky charm and naturally candid personality. Yet he does not retch. He refuses to pull away. He doesn't have to see to know that she is readying the whip, taunting him by saying he needs to grow a pair. He can feels naked even though his clothes are on, and he doesn't feel ashamed, because he thinks he loves this girl, and he knows that he must accept all sides of her, including this one.
She cracks the harsh leather down and he's dangerously close to opening his eyes, but he steels himself and endures every lashing and what each one means. Some part of him knew that each lash was for every day he never told her how freaking amazing she was, or how hot she looked, or how much better she was than all those other girls. He bites his lip and takes everything she has to throw at him, his clothes torn at the back where she unleashed her pent-up rage, until she cackles as the stinging sensation engulfs and suffocates him, "Yosuke, you're so whipped!"
He always wakes with a start, before rushing to the bathroom to take a long, cold shower.