Age: 18 Hight: 189 cm Weight: 74 kg Bloodtype: A He is popular singer who gets every woman he wants but none of them makes him feel like Izumi does so if you read the manga. You can see how he always looks bored when he is with women. He never showed his feelings before he met Izumi.Actually Koji sees Izumi first time on football field and falls in love with him thinking he is girl that happens when they are both 9 years old. He has two brothers Hirose and Akihito. He left home and school and started to sing.In Desparate Love he goes back to school just to be round Izumi.Thats so sweet of him. He is the only one who can block Izumi's balls at this point.