Mashiro Naomoto wants to have a taste of romance and maybe go a little further than that, now that she's in high school. However, she lacks self-confidence and she figured that it's impossible for anyone to like her. But to her surprise, a handsome boy named Oosagi-kun suddenly confesses to her. Mashiro suspects that his confession must be the result of some punishment game, but her own desires overcome her doubts, and she does the unexpected by making her own moves on him?! This is a rom-com where a high school girl's libido runs wild!! (Source: Comic-Meteor, translated)