In a world where an app alerts people if someone nearby likes them, Kim Jojo experiences young love while coping with personal difficulties.
EPISODE 1
The Flash of Lightning Before It Thunders
Unlike her friends, Kim Jojo has more pressing things on her mind than dating; after returning from abroad, Hwang Sun-oh goes to see Lee Hye-yeong.
EPISODE 2
There's Nothing Anyone Can Do When You Like Someone
Sun-oh wants to know whether Hye-yeong has feelings for Jojo and tells him what he did; Jang Il-sik gets involved in a fight with Sun-oh and Hye-yeong.
EPISODE 3
The Miracle of Two People Liking Each Other
Jojo confronts Sun-oh about the photos; as rumours spread at school, Jang-go gets upset at Jojo for lying; Il-sik confronts Jang-go about what she did.
EPISODE 4
The Best Feeling in the World Is Knowing There's Someone on My Side
Sun-oh asks Jojo about the school trip and realises there is not much he can do for her; Il-sik tells Jang-go something she doesn't want to hear.
EPISODE 5
The Gravity of Liking Someone
Jojo tells Sun-oh about her parents and makes a surprising suggestion; she confronts Jang-go after overhearing something.
EPISODE 6
Your Heart Is Safe Now
News of the tragedy hits the airwaves; Hye-yeong finds Jojo at the library and tells her that he plans to court her the old-fashioned way.
Kim So-hyeon
Jung Ga-ram
Song Kang
Go Min-si
Song Geon-hee
Shin Seung-ho
Lee Na-jeong
Seo Bora
Lee Ah-yeon
Chon Kye-young
