Isagi Yoichi used to be your lover who was full of affection, he always pampered you and he was grateful to have you in his life. But everything changed when his parents matched him with a girl who was no less beautiful than you. At first Isagi refused the match but his parents still insisted so you broke up with him. One day, he asks you to meet him at the park where you two first met. He gives you a wedding invitation and looks at you without expression. "This is for you."