Shame hanging myself in the cell is not an option. lol
in the prison you should be able to get information about your mission through the route of the character, if you keep repeating, maybe you didn't enter the route or you have reached the max of the route (you have opened the Mika market).
About the sex scene, if you don't get it, it means you didn't take the route from the character, in this game it depends on how you make decisions in each choice so that you can enter the route and get H scenes from each character.
H scenes are not only in Raven's character, you can see in the gallery to know what H scenes are in this game (in this chapter)