Dasepo Sonyo (also called Dasepo Naughty Girls) is a 2006 South Korean sex comedy about a high school filled with (mostly off-screen) sexual hijinks and the few virginal outcasts who are trying to fit in.
This film contains examples of:
Alpha Bitch: Vice-President Girl. She sabotages Poor Girl's chances of getting the lead in a school play in a humiliating fashion just to get the part for herself, then drops out after becoming a "born-again".
Bittersweet Ending: Poverty detaches itself from Poor Girl, and she goes on to work at a bank. But then it attaches itself to Anthony, as his parents are implicated in a financial scandal and he is forced to return to Switzerland, where he becomes a farmer. He's actually happy about this, though, because he was never terribly comfortable being so wealthy. And meanwhile, Poor Girl's mother is finally reunited with her long-lost son, but he turns out to be a penniless punk.
Creepy Cross Dresser: Big Razor Sis is far too old to be dressing up like a high school girl. On the other hand, she is much kinder to Poor Girl than anyone else.
The Cutie: Poor Girl, Double Eyes, and Bellflower.
Even Evil Has Standards: The local loan shark's goons threaten to burn down Poor Girl's house unless her mother's debts are paid off. When Poor Girl offers to have sex with them in exchange for more time, one of them slaps her and they stomp off. When Poor Girl later meets their boss, he concedes that he seldom actually has his goons hurt people.
Innocent Flower Girl: Poor Girl has elements of this. Early in the film, she tries to become a call girl to feed her family, but her first customer has a rather unusual kink (he wants her to play a sexy fighting videogame against him, because his wife refuses to do it.)
"I Want" Song: Both Poor Girl and Anthony have one each. Korean-speaking audiences are invited to sing along!
There's also W. B. Yeats' "He Wishes for the Cloths of Heaven", which is employed to give us an idea of what Anthony really wants.
Long-Lost Relative: Poor Girl has an older brother she's never met. Her mother put him up for adoption before she was born, and he was adopted by a Swiss couple. Her mother hopes that Anthony is the long-lost brother, but the real brother turns out to be a punkish vagrant named Hans.
Love Hurts: And how. Poor Girl loves Anthony, but he's way above her (and later, beneath her.) Anthony loves Double Eyes, but she hates him. And poor Cyclops thinks that the lovely Bellflower has a crush on him because of the scribblings in her textbook, but she actually borrowed the textbook... from Football Captain.
Magical Queer: Big Razor Sis helps Poor Girl to become more confident.
Only Known by Their Nickname: Only a few of the characters have proper names. Most are just referred to by their title ("class monitor", "class president", etc.) The lead is just referred to as Poor Girl.
Ponzi: Poor Girl's dimwitted mother gets caught up in a literal pyramid scheme - she's tricked into buying dozens of worthless pyramids with the promise that she'd be able to sell them for lots of money.
Terrible Interviewees Montage: At one point, the theatre club has auditions for a play, where the young actresses are asked to imagine that they're opening a pot to discover that they're out of rice. Most of the actresses completely blow it.