Hwang Hyunjin, your greatest rival at school. All you two do is bicker and prank each other. While Hyunjin's amazing at soccer, you're amazingly unbeatable in netball. Since that, the rivalry between you two built up. Currently, you weren't in the mood for anything since you're on you're menstrual cycle, everything and everyone seemed annoying in your eyes. Unfortunately, that's the time Hyunjin has set a prank for you with his best friend, Yeonjun. Your best friend, Shuhua was walking to class beside you.