Cha Ji Woo is a second-year student of Mass Communication and Journalism. He is short in stature and very gentle in nature. He is also besotted with Bae Yu Na, one of his classmates. However, she is being stalked by a mysterious individual and is afraid of all men as a result – except Ji Woo. The problem is she doesn’t really see him as a man, and this doesn’t help Ji Woo’s cause, although he will stop at nothing to protect her. But one day, a university class requires that students all pair up in “couples” to complete a project about love. Everyone forms heterosexual “couples.” However, Yu Na and a female classmate who is in love with her professor decide to team up as same-sex “couple.” That means Ji Woo must form a “couple” with a tall, confident senior student he’s never met before, Lee Ro Ah. After they begin working together, Ji Woo starts to wonder if Ro Ah likes him. And if that is the case, could his feelings for Yu Na be misplaced? And could he develop affection for Ro Ah?

Lee Hyun is a university freshman. He is cheerful, and optimistic, and has never really experienced any form of emotional hurt or heartbreak. His university days start with a bang when he sees and immediately falls for Kim An, a young tutor in the same department where Lee Hyun is studying. Lee Hyun starts following Kim An around like a puppy, pestering the cold and aloof young tutor with questions. Meanwhile, Joo Hyuk is a student who is returning to campus after a break. He meets and has a fling with a man named Sung Min after they meet by chance, but the latter vanishes without a trace the morning after. Joo Hyuk is shocked to later discover that Sung Min is actually his new class’s teaching assistant. And fellow student Min Woo is also stuck in a confusing romantic situation: He has a secret crush on his unemployed best friend Ma Roo. Will Cupid help sort out the love chaos as these six young men strive for academic – and romantic – success?