Prison bl’s

If you don't mind danmei (novels), "Restricted Area" is goated.

https://www.mangago.zone/read-manga/the_time_between_dog_and_wolf/
I believe there’s an instance or two of attempted sa on the uke by other cell mates, but never the seme. The seme rescues him and protects him

There's "wolves behind bars" but its kinda mid so your call

idk what you're expecting from prison. Not exactly a happy place

Pandora's heart