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 Young. Jojo receives a special gift from an unknown sender.

Jojo offers Hye Young 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 Chon about the shield at an event attended by the Badge Club members, including Sun Oh. Hye Young comes face-to-face with his father.

Curious about her true feelings for Hye Young, Jojo returns to her alma mater in search of information on Chon Duk Goo — and runs into her past.