Meet Je-in, an average 24 year-old girl (and an avid DBSK fan), as she goes on a roller-coaster ride called love. She never had any experience or interest in romantic relationships until she gets entangled in a series of one-sided and unrequited loves. 

Lee Mira, a production assistant, is her best friend and housemate. They grew up together and promised to stay with each other for the rest of their lives. 

Do Kyungsoo, a rising actor and a member of the boy group EXO, is also her best friend and childhood friend. He always seemed to be quiet and neutral in everything except for anything related to Je-in.

Yook Sungjae, also a rising actor and a member of the group BTOB, is a boy she met through Kyungsoo and they got along so well because they are both DBSK fans. But is that the only reason he sticks close to this noona?

Seo Inguk, a famous singer and actor whom she met through both Sungjae and Kyungsoo. He looks so mysterious despite his jolly nature. And whenever he smiles at Je-in she starts getting an upset stomach and continuous hiccups.

Join these characters as they venture on a love quest that will bring some happiness and disappointments. Follow them as they mature into through simultaneous one-sided and unrequited loves. And be with them as they uncover the mystery of their secret love.