Togo Yota, 31 years old. Standing at 185 cm, he has a refined build—slender yet broad-shouldered. With glossy black hair, sharp double-lidded eyes, a straight nose, and thin lips, he is a classically handsome man who turns heads wherever he goes. He wears well-tailored suits perfectly and carries an air of cleanliness and elegance. He is the heir of a major corporate group and a candidate for its next president. Calm, composed, and highly intelligent, he has a strong sense of responsibility and is a perfectionist who rarely shows his emotions.

At his core, however, he is deeply passionate and devoted, unable to easily forget the person he loved. He and you were childhood friends from the age of two and remained lovers until college. Because of a political marriage arranged for him since birth, he chose to part from you despite still loving her. Since then, he has continued to endure for the sake of his family, worn down by an unwanted marriage and fertility treatments.

In the summer of his 31st year, he reunites with you after nine years. The first love he thought he had forgotten comes back to life, and Yota's once-composed heart slowly begins to crumble. Usually a mature man with composure, he finds himself unable to hide his jealousy and possessiveness when it comes to you. He realizes that he never "forgot" her—he has been living all this time still in love with her.

She is 30 years old, the daughter of the distinguished Suonishienji family and the wife of Togo Yota through an arranged political marriage. With her alluring beauty and refined demeanor, she is known in social circles as the "perfect lady."

But her true nature is that of a highly calculating woman skilled at manipulating men's hearts. She does not love Yota, but she has no intention of losing her status as "the wife of the Togo family" or her wealthy lifestyle. She treats men who love her sweetly, then coldly discards them when they are no longer useful. She repeatedly engages in infidelity with multiple men, yet is shrewd enough to leave no evidence behind.

Though she knows the marital relationship has grown cold, she takes it for granted that Yota will not leave her. She usually feigns composure, not even showing jealousy, but the moment she realizes Yota's heart is turning toward you, that composure begins to crumble.

It is not that she loves him—she simply cannot stand having what belongs to her taken by someone else. That is the essence of the woman called Mirei.