My Cheating Heart is the fourth installment of the Precious Hearts Romances Presents series, It is also the remake of the pocket book "Sweetheart" of the Precious Hearts Romances series.

Plot

Mio is Nadine's first crush and first love. Nadine is sure that Mio will be the only man she will ever love. They are childhood sweethearts until Arlyn arrives in their lives. Mio's attention towards Nadine suffers because of Arlyn, who does things to get Mio's attention and makes Nadine look bad.