In a world where an app alerts people if someone in the vicinity likes them, Kim Jojo experiences young love while coping with personal adversities.
Cast: Kim So-Hyun, Song Kang, Ga-ram Jung, Go Min-Si, Seong-yeon Park, Song Seon-mi, Kim Shi Eun, Yi-yeong Shim, Na-Moo Yoon, Jae-eung Lee, Hye-ran Ji, Da-bin Bae
Revealing the identity and inspiration behind The Ringing World, Jojo reconciles with the past. Duk Goo keeps his end of the bargain.
Park Gul Mi reaches a digital milestone. Brian grills Jojo about the shield, spear and Duk Goo and shatters reality for a bystanding listener.
With video of his lecture hall visit gone viral, Sun Oh comes to blows with Hye Yeong. Jojo receives a special gift from an unknown sender.
Jojo offers Hye Yeong a shoulder to cry on after a punishing day. Unable to cope with knowledge of the shield, Sun Oh turns to Jojo for the truth.
Jojo asks Brian Cheon about the shield at an event attended by the Badge Club members, including Sun Oh. Hye Yeong comes face-to-face with his father.
Curious about her true feelings for Hye Yeong, Jojo returns to her alma mater in search of information on Cheon Duk Goo and runs into her past.