Hi everybody,

I've searched but can't find the name of this manga. It's about a girl who gets sent to prison wrongly for fraud I think. There's a guard there who does sexy things to her. I remember that her male friend who had a crush on her came to visit her in prison and did things to her while she was talking to the other guy.
Help greatly appreciated!

Amai Choubatsu?

fuck

Sweet Punishment