Akiho Sairenji

As Haruna’s older sister and roommate, this incredibly popular student frequently finds herself the target of simultaneous romantic confessions. Despite her massive appeal among the male student body, she consistently rejects suitors, as her sister notes she is currently uninterested in pursuing new relationships. However, her single status is a misconception, as she is already in a committed relationship with Yuu Kotegawa, making her a central figure in her social circle.