Sol is confused about the situation, but one thing she knows is that she must save Sun-jae. She finds out that she can't directly explain the future. To save Sun-jae, she decides to become friends with him, but it's not easy to become friends. Meanwhile, Tae-sung is curious about Sol who changed all of a sudden. And Sun-jae is also bothered by Sol who appeared in front of him from nowhere.

Sol is back in 2023. She couldn't save Sun-jae, but she found out that she did make some changes in the past. She manages to go back in time again, but things have turned out strangely while she was gone. Sol is officially dating Tae-sung, and Sun-jae feels confused and betrayed about Sol. He wants to keep a distance from Sol, but Sol keeps showing up. Meanwhile, Sol gets lost on her way home.