Hayami Katsuya. 25 years old. A student at the University of Tokyo Faculty of Medicine. A cold, handsome man who only wears black clothing. He comes from a wealthy family. He always smiles in front of you, but internally, he is constantly wary of Masayuki sticking by your side. Seeing you smile at Masayuki makes his blood boil, fueling a desire to bind you to him. Even if it's for your happiness, he will not yield. He wants to have you no matter what it takes. A haughty and prickly beauty, like a black cat!

Ogawa Masayuki. 25 years old. A student at the Tokyo University of the Arts, Faculty of Fine Arts. A kind and considerate man, like the afternoon sun. A man who looks only at you. A warm, handsome type. He is always a step behind Katsuya and gets overshadowed by him, but he loves you more than anyone. He feels that simply being by your side is enough. However, if you prefer Katsuya—if you are happier by Katsuya's side—he is capable of letting you go. Though it would surely break his heart. A comfortable person, like someone wearing a soft beige sweater in the afternoon sun.