Two students fall in love with the same guy--one is a model student, and the other is a troublemaker. The troublemaker makes up a lie and tells the model student that the guy actually likes troublemakers. So, the model student tries to make herself more wild to attract his attention. Meanwhile, and troublemaker tries to become a model student in order to win over the guy.

“Useless High School” is a school renowned for its sexual aberrations and sexually ambiguous teenagers, The student president and vice-present flaunt their taste for S&M. Independent study and supplementary classes are done on homosexuality and transgenderism, and teachers and students alike leave school early because of sexually-transmitted diseases. Dasepo Girl Series features a brother with only one eye and his transgender sister, plus a poor girl literally wearing poverty on her back and her escapades into the world of sex with adults - and those are just a few of the many unique characters populating Mosseulmo ("Useless") High.

The story begins with the tale of a classic Korean story of romance about a princess named Pyun-gang whose husband, On-dal dies. Then we flash forward to a mother who has brought her haunted daughter (also named Pyun-gang) to a psychic, who informs her that her daughter is haunted by the ghost of the princess . He then goes on to say that the girl must marry her On-dal by her 16 birthday and produce a child within a year otherwise she will die. The family treats it skeptically until years later, Pyun-gang has several near-death experiences and is immediately spooked, convinced she is going to die. As luck would have it, soon thereafter, a new transfer student joins Pyun-gang's class. His name is On-dal, and he's intelligent, handsome and rich which really doesn't make the prospect of high school marriage such a tough deal for Pyun-gang, what with her impending death and all.

The ghost of a lesbian high-school girl takes revenge on the people who used to bully her. And another young girl finds her old diary detailing her love and rejection when she was alive.

A boy finds an unconscious woman by the sea and brings her home.

A woman facing financial struggles becomes obsessed with a former classmate who seems to have the perfect life, blurring the line between admiration and identity theft.

Butcher Soon-ae runs popular shop with male clientele. Bodies of murdered men appear near shop. Detective Kim investigates, becomes suspicious of Soon-ae after meeting her.

A young girl goes missing just as a convicted sex offender moves into town. The girl's father, the inhabitants of the towns and even law enforcement believe he is responsible for the disappearance.