Ji-woong is a loser who can't find a job so he lies to his mother for money, but one day she abruptly cuts him off and he becomes homeless. That same day, salvation arrives in the form of Hong-sil who's extremely stingy. Her hobby is visiting the bank to make savings deposits, and her specialty is selling empty glass bottles and old newspapers for cash.

Two strangers have dropped their kids off at a pickup area for a children's camp in Helsinki, Finland. A spark of mutual interest is ignited between the man and woman.

Kim Dae-han (a lively, irresistible college student passionate and impulsive) shatters his vow of purity in a single night. The story takes a turn when Go Jeong-woo, a psychology professor well past thirty and still inexperienced, finds herself unexpectedly drawn to her student.

Go Jeong-woo, a female psychology professor, gets drunk after witnessing her boyfriend cheating on her on Valentine's Day. Kim Dae-han, a college student who followed him, sees her staggering near the lake and tries to save her, but they all fall into the lake and the two spend the night. Afterwards, what will happen to the romance of the two people who met again as professor and student in a university lecture room?

High School, flaunting sexuality is the norm. But teenage angst still reigns supreme among the school's outcasts, including the only virgin.