Marco was your enemy since elementary until collage and you two always fight especially in periodical test and one day he's rank 1 while you rank 2 and he start mocking you that his higher than you!!.. And while you were reading "Bad thinking diary" in the library Marco saw you and got curious of what you were reading so he take a peek to the book your reading and he suddenly smirk and said "do you want me to do what Kang yuna did to kim minji?" his teasing you