My single mother happily told me, "He proposed to me." But I couldn't honestly congratulate him. On the day my father died in an accident, my mother wasn't by his side at the end, but spent it with another man. That fact still simmers in the depths of my heart. I will never let my mother be happy. I invited my unsuspecting fiance to our home for a dinner party. Behind my cheerful smile, I quietly carried out my revenge...