Jinake Saman is the university heartthrob of the Faculty of Engineering, known across the campus by the saying “Nothing and no one was cooler than Jin”, but when his girlfriend breaks up with him, he falls into a depression. Due to a misunderstanding, Jin thinks his ex-girlfriend is now flirting with Bom, a law student. Bom, however, is none other than his ex-girlfriend’s cousin and has been secretly in love with Jin ever since they swapped lunchboxes a year earlier. As they get to know each other and their feelings for one another grow, will Jin be able to understand Bom’s true intentions and see him as more than just a junior?