One fun, slightly tipsy night with her brother’s two best friends, Jiwon and Eunho, turns into a threesome Yeonhee never expected... and then somehow, it happens again. Who will she choose? Jiwon or Eunho? Who will emerge victorious as the winner of Yeonhee's heart... and lower regions? To add onto her troubles, she has to keep this all a secret from her older brother, Yeolchan. Will they pull it off? Or will one slip-up bring everything crashing down?