What if these two strangers meet at the most unexpected event? What if their relationship comes to more than strangers? Lee Jieun is an average girl with a normal life. Happy family. One best friend who she had since middle school. And a perfect boyfriend who loves her just

"I didn't expect to fall in love this summer."   "Who would've thought that I'll be lost in my own summer paradise?"   "Sorry, but I can't be with you."   "Don't wait for me."   "I'll stay by your side."

He is loved by many. But he never truly loved someone before. He never tried to go on steady.