A Love to Kill(2017)

Original title: รักซ่อนแค้น

Puen grew up in a foster home with his elder brother, Mek. After a misunderstanding occurs between Mek and his girlfriend Inthira, an emotionally wounded Mek jumps from a rooftop and falls in to a coma. Driven by anger and thirst for revenge, Puen approaches Inthira as a bodyguard. But as he spends time with her, Puen gets increasingly burdened by the forbidden love he develops. Meanwhile, Inthira - not knowing about her ex's relationship with Puen, nor his intentions to destroy her life - falls in love with him.