you're a high school student and you and Wonbin are friends with benefits. your older brother, eunseok, doesn't like him (because eunseok caught you two making out once). You both agreed in three rules, but the first one is not to fall in love with each other. Wonbin is that typical bad boy, but he doesn't curse you or something. Actually, he often compliments your body. Well..the parts that interest him the most.