Hyuna, Luka, and her brother Hyun Woo all knew each other during their time in Anakt Garden. It's implied that she was very close to both of them. However, Luka is seen to have had deeper feelings for Hyuna as he attempted to kiss her. The (attempted) kiss seemed to have distressed Hyuna.

While It's unknown what transpired between Hyun Woo and Luka, it's implied the two had a fight which resulted in Hyun Woo's death.

Later on, Hyuna loses her round during the 49th season of Alien Stage but escapes her death, losing her leg due to rubble that fell on her. Luckily, she's rescued by the human rebellion where she befriends Isaac, Dewey, and Jacob, the former leader. However, after she joins, Jacob is kidnapped and tortured by the aliens and later passes away from his injuries following his rescue.

Present Hyuna, now the leader of the rebellion, rescues Mizi from Alien Stage, and along with Isaac and Dewey, they go on a mission to presumably rescue the remaining participants, Till and Ivan. During this break-in, she gets injured, taking a shot to her right Side. Hyuna and the other rebels break into a security room but Mizi leaves to attempt to save Till. After failing to convince her, Hyuna lets her go and starts to download something onto her computer. At the end of the round, Hyuna arrives on stage and reunites with a surprised Luka. "I resented you so. I had to keep moving forward in every moment... But you were always my one and only weakness. That's why I resented you so. Luka, live with love. Embrace the pain, the frailty and the moments so unbearably shameful. Forgive yourself… Again and again, endlessly. Because everything… begins from there.”

Live.. With.. Love? crying over Hyuna's death after,Mizi attacks him again, drawing him out from that state. He is met with a hallucination of a smiling Hyun Woo after Mizi tells him to stop being righteous and how neither of them deserve to be saved. The effect that Hyuna had with her parting words to Luka were immense as he realizes the impact that Hyun Woo's death had on her.

At the end of the sad experience, Luka is last seen being engulfed by the flames of Alien Stage as he is hunched over Hyuna's body.

Seven years after the incident, however, he appears on a billboard. " Lukas Back"----