The page from the manga is Prison School (Kangoku Gakuen, 監獄学園), which is probably where you got this from. As for the picture below, I couldn't have figured out, probably related to that same manga...
Just a heads up, you might want to prepare to update this soon. It suffers from no-progress bug that is currently under rapid debugging.
Scheduled to be fixed on May 1st at 22:00 JST. 聖騎士リアナ