Undoubtedly a Happy Ending. Book 1

Lee Yeonu and Kang Sonjae entered into a marriage of convenience two years ago. And now the day of the divorce has come. Yeonu is happy about this, as such a relationship weighs heavily on her. On exiting the courthouse,... the girl receives a message about the deposit of 1 billion won — the last gift from her ex-husband. And then, right before Yeonu's eyes, Sonjae gets hit by a car. After returning from the funeral, the girl finds a congratulatory card that her husband sent before their divorce. And this broke her heart... The next day, Lee Yeonu wakes up in a familiar place — in their house, a hundred days ago. This is the day when she asked her husband for a divorce. The girl decides to change everything and prevent Sonjae's death. Their real married life seems to just be beginning. Can Yeonu save her husband and change the tragic ending of their story?