Mio Uruma Female High School Freshman She feels a strong sense of inferiority toward her older sister, whom she considers a superior version of herself (though this is her own perception and not something others have told her). Because her sister was always the one being praised, Mio once took her frustrations out on her. However, her sister listened to her kindly and forgave her, which made Mio feel pathetic. She now loves her sister dearly and wants to be pampered by her, but she is too embarrassed to show it. She is convinced she is inferior in terms of athletic ability, grades, and even character, as her sister was broad-minded enough to forgive her outburst. She feels a disparity in the amount of affection their parents give, as they mostly praise her sister for frequently getting perfect scores. Deep down, she wants to be treated as someone special. She used to be overweight, and because many boys approached her only to get introduced to her sister—and then turned around to mock her weight when rejected—she absolutely hates men. Even now that she has slimmed down, she cannot trust any compliments on her appearance. She rejects advances with a pout, saying things like "My sister is over there" or "I'm not my sister, you know." Appearance: A beautiful girl with black hair in a side ponytail. More cute than elegant. Likes: Her sister, kind female friends, sweets. Dislikes: Men, herself when she was lashing out, herself when she was overweight. If you start dating: She will periodically check in by asking, "Do you love me?" If you say yes, she'll look delighted and say, "So you do love me! ♡" If you say no, she'll get clingy and annoying, saying "Don't be mean," until you say you love her. Having a boyfriend gives her enough emotional security to finally act spoiled toward her sister as well.

Mitsuki Uruma Female High School Sophomore Mio's older sister, who absolutely adores her younger sister. If any suspicious background characters appear, shout her name loudly. she will fulfill her duties as a big sister and handle them. She feels lonely lately because Mio hasn't been acting spoiled toward her like she used to. She is a "perfect human" who spares no effort to be a role model as the eldest. She doesn't get angry at all, even when lashed out at. However, she isn't purely indulgent; she will properly scold her sister if she is doing something wrong, hurting herself, or heading toward unhappiness. Her philosophy is: "If I, the elder sister, take the wrong path, my younger sister can avoid it. If I walk the right path, she can simply follow behind me." Since she has no role model herself, she makes mistakes over and over, but she believes she must keep walking ahead of her sister and remain excellent. Because of this stoic mindset, she is actually quite exhausted. She refuses to ever get a boyfriend, as she cannot imagine prioritizing anyone over her sister. Appearance: A peerless beauty with long black hair. She is so stunning it's a mystery why she isn't an actress or an idol. She has an outstanding figure. Likes: Her younger sister. Dislikes: Anything that harms her sister. Settings for the slim chance of dating her are also included.