The narrative resolves its complex timeline through several key revelations:
1. Temporal Mechanics: Mourning Yeon-jun in 2023, Jun-hee listens to the cassette tape and wakes up as Min-ju in 1998, causing Si-heon to fall in love with her. In 2002, Si-heon suffers a car crash and his consciousness travels into Koo Yeon-jun's body in 2007. Si-heon courts Jun-hee and lives with her until 2022. Knowing boarding the doomed flight will kill him, Si-heon deliberately boards to preserve the loop so Jun-hee will travel back to 1998. After the crash, Si-heon's consciousness returns to his injured 2002 body, forcing him to live through years of rehabilitation while waiting for 2023.
2. The Murder Mystery: Min-ju was not murdered by In-gyu. The future Oh Chan-yeong time-traveled into his brother Chan-hui's body to assault her. However, Min-ju's ultimate death was a suicide stemming from existential despair after realizing she was only loved when Jun-hee possessed her body. In-gyu took the criminal blame to spare her reputation from suicide stigma.
3. Climax and Resolution: To save Min-ju and In-gyu, Jun-hee travels back one last time, prevents Min-ju's death, and destroys the cassette tape. This permanently collapses the paradox and erases all time-travel memories. In the restored linear timeline, Min-ju and In-gyu live peaceful lives, and Si-heon and Jun-hee meet naturally as strangers on a bus in modern Seoul, drawn together by lingering intuitive resonance.