Preface - In the vast sea of people, meeting each other is a kind of fate, but luckily we can hold each other's hands.
Her youthful and frivolous personality, bohemian appearance, and sensitive and fragile heart were all changed by her arrival; because of her, the boundless glaciers in her heart melted, changed the trajectory of her destiny, opened the hard shells around her, and gave her the softest heart to live in and rely on.
She told her, "I will give you the love you were missing before."
"I won't let you sink anymore."
"I will never leave you, I will take care of you on behalf of your parents."
...
But she said, "You disappeared without a trace in my life."
"You only left me a decisive figure, leaving me nowhere to pursue."
"I hate you. I can't forget it even if I don't want to. You broke the oath you made, but I still stubbornly watch."
...
Why did the two people who were teased by fate have such an ending? What happened between them that made them deeply bonded? What will their future be like?