Love Alarm is an app that tells you if someone within a 10-meter radius has a crush on you. It quickly becomes a social phenomenon. While everyone talks about it and uses it to test their love and popularity, Jojo is one of the few people who have yet to download the app. However, she soon faces a love triangle situation between Sun-oh whom she starts to have feelings for, and Hye-young, who has had a huge crush on her.
A woman works as a special makeup artist. Because her heart was broken in the past, she finds it hard to love again and has a cold heart full of sadness. She unexpectedly falls in love with a humanoid robot programmed to be the perfect boyfriend and all the while a top star is competing for her affections as well.
