Roy Rak Raeng Kaen (รอยรักแรงแค้น)

Kimhan and Mookrin's love ends when Kimhan thinks that Mookrin's brother, Thada, had killed his sister for her fortune. Kimhan plots his revenge by ending his engagement to Mookrin and then asking her friend, Paktra, to marry him. Kimhan introduces Thada to the gambling world where hr got a large debt to pay off. Kimhan then forces Mookrin to repay her brother's debt. (Source: OhSweetHaven)