Shung Kang-Nim

Shung is the class representative of Yuna's class. He is a member of the Yuna Band under the username "Parrot" in their chatroom.

One day, when Onyu and Yuna are going to a bookstore on a "date", they encounter Shung. Yuna invites him to eat lunch with her and Onyu. The three of them sit at a table in the cafe, and Yuna and Shung talk about books at first while Onyu stays silent while looking out the window. Shung mentioned previously that he has photographic memory, and yet has an unsure sense of familiarity with Onyu that he can't place. This puzzles him which leads him to then ask where Onyu lives. Onyu responds by saying he has amnesia and so doesn't know the answer himself. Shung then asks how the two of them met, and Yuna tells him frankly what Onyu said, that he came from the future but didn't have any memories in order to prevent paradoxes. Onyu tries to play off her response as a joke, but when Shung ignores him and address Yuna, Onyu suddenly becomes aggressive. Shung asks him how the time travel works, to which Onyu reluctantly agrees to explain at Yuna's recommendation.

During the conversation, he shows Shung the notebook he has dictating that Yuna will be assaulted by Bustard and Crow on the 27th of March. Shung begins to point out the flaws in Onyu's explanation, such as stating that Onyu's presence is what seems to aggravate the Yuna Band in the notebook more than if he were not present. Shung's words put Onyu more on edge until he tries to stab Shung with a knife. Shung easily pins Onyu down on the table with him making death threats at Shung. Shung turns his attention to Yuna, saying she doesn't need to hang around him anymore, and that she never fully believed his words anyway.

Another day at school, Shung is asked by Yuna if they can meet in the break room. Yuna believes that since Onyu was able to be around her without being affected by the 'curse', that she can now ask out the class president without worry. Shung quickly rejects her, however, saying once again that her neutral state about Onyu might actually be more hurtful than being straightforward. At one point, the fire extinguishers go off, and Shung finally states that he simply doesn't like her but "hopes they can still be friends".

Shung later sees that Cuckoo has made a post, uploading a picture of him when Yuna hugged him during her confession of love. He marks Shung a traitor on the post.