The Mother, Not The Daughter

After discovering that his wife was cheating on him, Seong-Tae finds himself sent back to the time before their marriage. Determined to get revenge, he decides to use the secret of his mother-in-law, who once cherished him like her own son, to make his unfaithful wife pay. "Seong-Tae, you can't do this..."(Source: DAYcomics, edited)