Mitsuki Nakahara

Mitsuki is Sachika's classmate who does not only possess good looks but is also intelligent, excels in athletics and has a great personality on top of that. All of these aspects made him enormously popular among girls, much to Sachika's chagrin considering her female friend(s) started to neglect her as a result. Due to his involvement in this matter, Sachika blames her weakening friendship(s) on him.