Sassy girl-Chunyang

Story:

Delightful Girl Chun Hyang is the 2005 interpretation of the Legend of Chun-hyang. The story begins when Lee Mong-ryong is transferred from Seoul to a high school in Namwon, North Jeolla Province and the story really starts when he accidentally shot an embarrassing video of her while filming something unrelated for his childhood friend Chae rin. Chun-hyang, shocked and mortified when she saw the video, immediately smashed Mong-ryong's phone into pieces. Mong-ryong was upset and vowed to find a way to force Chun-Hyang to pay for his phone's replacement. As a result, they were constantly in contact, made easier by the fact that Mong-Ryong enrolled in the same school as Chun-hyang when he moved to Namwon. As part of his revenge, Mong-Ryong made a point of bullying Chun-hyang at every opportunity. In a dramatic turn of events, Mong-Ryong and Chun-Hyang find themselves forced into matrimony after unintentionally spending the night together (despite no sexual encounter having taken place). A top student, Chun-Hyang helps Mong-Ryong earn the necessary grades to gain admission to the University of Korea.
A new conflict in "Delightful Girl..." arises when Byun Hak-do falls in love with Chun-hyang, though the feelings are not returned. Rather than give up, Byun Hak-do becomes determined to make her to fall in love with him at any cost.

Info:

Delightful Girl Choon-Hyang (쾌걸 춘향, Kwae-geol Chun-hyang), also known as Sassy Girl Chun Hyang, is a Korean television series about two high school students, Chun-Hyang and Mong-ryong, who accidentally spend a night together and are forced into marriage. The series is based on the 2005 interpretation of the folktale Chunhyangga.
For the year 2005, Sassy Girl was one of the highest rating shows in Korea. Consistently on the top ten list, it has been a favorite among viewing public because of its different approach on love and marriage.