Hua Jai Nee Puer Ter (1992)

Hua Jai Nee Puer Ter 1992 / หัวใจนี้เพื่อเธอ 1992 / This Heart for You , หัวใจนี้...เพื่อเธอ

The female lead has a heart problem. At first she didn't get along with the male lead, but one day she almost drowned and he saved her. He found out about her symptons so he was nicer to her, and they eventually fell in love. He always told his dad that if anything ever happens to him, he wants to give his heart to her... (Source: XuongPhim)