I was talking to@Kamiamon about the drama Cheese in the Trap which is based on a popular Korean webtoon, and we were trying to think of other Korean dramas based off of manga or web toons^^
It is based on the Japanese manga Itazura Na Kiss written by Tada Kaoru.
Here's the manga plot according to Wikipedia -
In this romantic comedy story, a high school girl named Kotoko Aihara finally tells a fellow senior named Naoki that she has loved him from afar since she saw him on their first day of high school. However, Naoki, a hottie "super-ikemen" (handsome male) who is smart and good at sports, rejects her offhand. Fate intervenes when a mild earthquake ruins Kotoko's family house. While the house gets rebuilt, Kotoko and her dad stay at the home of her dad's childhood bestfriend...whose son is Naoki. Naoki eventually falls for Kotoko and starts to have romantic, protective feelings for her.
I liked the Korean version and haven't seen or read any other versions :D