She is his school girl and his third daughter. He is her senior and her true love. They made an agreement that he would be her husband and she would be his wife. Unexpectedly, he married another woman for the so-called family responsibilities. She did not hesitate to give up everything and became his third son just for the love that was engraved in her heart.
In the end, it is her eternal love that blossoms and bears fruit, or he gives up his family responsibilities to protect her.
In the end, everything was just her fantasy and her extravagant hope. She left love and betrayed her vows. She only wanted to face the sea and the spring flowers bloom.