Choi Yu-ju

Be My Boyfriend, a spin-off of the popular web series, Best Mistake, depicts the story of Lee Seung Min, a boy with zero presence who is offered a contract relationship by Oh Ji Na, the best girl-crush idol trainee in the school.

Kyu Han, a seemingly ordinary student, is cursed with an unlucky jinx. Every time he sneezes, things go exactly the opposite of what he hopes, forcing him into all sorts of unfortunate situations in his daily life. However, despite his supernatural bad luck, he still romantically chooses to pursue his one-sided crush, believing that if he just tries his hardest, there’s nothing he can’t achieve.

Born in 1981, So Won should be in her forties now, but when she became twenty in 2000, she encountered a witch by chance. So Won was cursed by the witch because she turned down her favor. The curse was "to live as a twenty-year-old woman for the rest of her life." At first, she thinks it will be a blessing but soon starts suffering from the pain of losing her beloved ones and her life re-setting every year. One day, So Won happens to spot the witch in a photo, so she heads to the resort in the photo's backdrop. To lift the curse, she sneaks in as a resort staff and meets Kang Hyun and Sang Wook there.