Until the Trashiest Boy Toy Exorcist Ren-kun Crushes Me in His Embrace

Even in the past, Chiyo had a habit of picking up abandoned animals that were in trouble. One day, on the way home from work, she encountered a beat up man sitting on the streets. She couldn’t leave him alone, so instead she nursed him back to health. This eventually leads to them deveoping a more intimate relationship.
Unlike his normal self, he’d be kind as he embraced me…
“Is it possible that he’s never truly satisfied when he’s with me?” This thought made Chiyo anxious. She is then greeted by a woman who claims that the man in question is actually the heir to a prestigious household of exorcists.
Why is this man that shares so little about himself with Chiyo?

“If you want me to ruin you so bad, then I’ll grant your wish.”
“I’ll smother you with my embrace until you go strange.”

A story about a kind girl who picks up many things and an enigma in the form of a trashy boy toy and how, after being such a wreck, that boy expressed his obsession for her through his body until she actually understood.