It's from sakusei biyoutou, either the visual novel or the manga. I've just read the manga but it's really fun.
I had to look it up because the premise sounded interesting, thinking "what could possibly be evil about it?" unknowingly what's to come (me)...If I looked it up correctly, that's the one about a guy who broke his hands but needs to masturbate every 3 hours or die and is in an evil hospital.