Tears on Fingertips

A promise made when she was a child, and various twists and turns of the story triggered by a beautiful diamond ring - fish tears. The female protagonist changed her personality due to the male protagonist leaving when she was a child. She became silent, but she was very cheerful and lively at heart. The male protagonist also changed his personality because of this, becoming cold, evil and sinister. What kind of sparks will happen when the two meet again? Will various misunderstandings break the peaceful life again? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.