Silver Spoon Season 1 Episode 5 E 5

"It will come tonight." A certain rumor, obtained by Nishikawa from a supposedly trustworthy source, circulates among the students. The target will appear at 9PM at a certain location. However, during that time, students are prohibited from leaving the dorm, and violators will be punished with bathroom cleaning duty. However, that does not deter the determined men from fighting for their honor! And now, it is time to execute their escape plan...