Seo-yul an 18 year old girl enters Han Yang University in Seoul as a first-year student to study history-philosophy.She is smart,confident,peacefull and has angelic beauty. Soon,she meets Rae-won a 19 year old boy, also in his freshman year, studying Sports and Arts who joins the university's basketball team.He is rich,cocky, annoying but undeniably attractive - a big red flag. Theirs paths cross in general classes like "English" and "World History ".The more they meet the more they hate eachother's guts. Will their rivarly turn into something more..?