Age: 20 Department of Computer Science, Yonsei University. She is a hardcore fan of basketball player Lee Sang-min, and her dream is to become his wife. She is the daughter of the boarding house owners, Lee Il-hwa and Sung Dong-il. She has a bit of a foul mouth.

A former Haitai Tigers player and current coach for the Seoul Twins. At home, he is an affectionate husband and a warm-hearted father who is like a best friend to his daughter. Though he is rough and clumsy at expressing affection, he is always his daughter's strongest supporter.

A Gyeongsang-do lady with a big heart and even bigger portions. She moved from her hometown of Masan to Seoul when Dong-il became a coach for the Seoul Twins and Na-jung entered university. She currently runs the Shinchon Boarding House. She is known as the 'Big Hand' of the boarding house world.

Medical Student Age: 24 From Masan, Gyeongsangnam-do Known as the "X-Generation beast who knows nothing of taste or style." He only thinks of Sung Na-jung as a younger sister, but his feelings begin to change after Guest arrives. He is a blunt and indifferent Gyeongsang-do man, but he is sly and sweet to the woman he loves.

Baseball Pitcher (Ace) Age: 20 From Seoul He has a one-sided crush on Na-jung.

The precious son of a wealthy family who was raised with the utmost care. In Samcheonpo, he was a renowned genius known as the local 'Leslie Cheung.' He ends up dating Yoon-jin after a long period of bickering.

Department of Computer Science Age: 20 From Suncheon, Jeollanam-do He grew up in abundance without ever lacking anything. Extremely curious and sensitive to trends, he was the first in Suncheon to own a Game Boy and a 386 computer.

Department of Computer Science Age: 20 From Yeosu, Jeollanam-do A typical shut-in and a hardcore Seo Taiji fanatic. She is the only female boarder besides Na-jung.

20 years old. The son of a poultry farm owner with a gentle and mild personality.