Lonely boarding house women! Any man who goes in there can't come out in one piece! Boarding house owner Hyeon-jeong and tenants Seon-mi and Joo-hee have a rule; boyfriends are allowed to visit, but they can't sleep together! One day, Joo-hee brings in her boyfriend, Jeong-sik, and they secretly spend a hot night together. The next morning, Jeong-sik tries to leave quietly, but gets caught by Hyeon-jeong. She tells him that he broke the rules and he needs to be punished, so she comes on to him.
Jung-suk's wife runs a boarding house and he helps by cooking, doing laundry, and cleaning. He's under his wife's control, but he doesn't give up his dream of becoming an actor and eventually passes an audition. Sun-mi and Hyun-jung from the boarding house overhear him practice and mistake him for a wealthy man. They seduce him for his money and he falls for them...
Seong-jin, the so-called expert of theory, who learned about women through text only, feels the thrilling excitement whenever he sees his academic advisor professor, Mi-ae. However, Mi-ae keeps ignoring his courtship, telling him to come back after growing up. He felt stuck and helpless and ends up revealing his distress to Yeon-hwa, a novelist who has recently moved to his next door. To his surprise, she says she will teach him about women and begins tutoring him with the real life lessons from kissing to sex.
