A second-year high school student at Hansol High, who is desperate to move into dorms. He has kept diaries since he was young, which his mother would read then laugh about with her friends. Exhausted with his lack of privacy, he eventually moves in with Hae-Jun and Eun-Yeong in the old dorm building. Unfortunately, his troubles seem to have followed him to his new home. His talkative nature rubs his dormmates the wrong way, unintentionally offending them, and his personal belonging start to go missing, leading him to accuse Eun-Yeong of stealing. Although his dorm life gets off to a rocky start, he is a very kind person, and a loyal friend.