In search for the "love of his life", Jongin has an infamous reputation of dating anyone that confesses to him on the first day of the week, on a condition that they will break up at the end of it if that person is not who he's looking for plus he only dates them once. And him being one of the popular guys in school, there's always a long line of females at the school gates every Monday. But one particular Monday when he got up later than usual, he arrived at the school gates an hour late and not a single person is left waiting for him unlike usual, well no one except a short boy from the disciplinary committee. Will this be the start of his usual weekly lover or will this be his awaited meeting with the "love of his life"?