Grant me a lifetime of love

Yona Levin's dying, her boyfriend signed a contract with the Grim Reaper to trade in his life for her, with the condition that he would forget about her. When he fell in love with Yona again, it was the death of his boyfriend. Five years later, Yona appeared at the Chavez's banquet with her two children. At the moment when her boyfriend recovered his memory, the mistress stabbed Yona with a knife...