
Sol Goes Back Again
Sun-jae is attacked again and he’s in a critical condition. Police disclose information on the culprit and Sol notices that the timeline has changed again. She manages to find a way to get back to the past, and this time, she goes to the same college with Sun-jae. Sol wants to keep distance from Sun-jae, but they keep run into each other. Meanwhile, Sun-jae gets a chance to get a rehabilitation training in the US.
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More from this season

S1 E1
Live Another Day
Sol had gotten into an accident and had no will to live a life. However, a phone call from Sun-jae, the vocalist of the group Eclipse, gave her hope and comfort. Since that day, she has become Sun-jae's fan. Years have passed, and Sol goes to Sun-jae's concert. But a few hours later, Sun-jae is found dead. And then, Sol goes back to 2008, when Sun-jae was still alive.

S1 E2
I Want to Protect You
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.

S1 E3
It's All About the Timing
Sun-jae wins the gold medal at the competition and he decides to confess his feelings for Sol. But due to unexpected events, it’s not as easy as it seemed. Sol thinks that she has changed the future, but Sun Jae gets hurt during practice. Sun-jae decides to quit swimming and it makes Sol heartbroken. Sol tries to comfort Sun-jae and Sun-jae finally confesses his feelings for her.

S1 E4
I'm Back
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.