You'd better appreciate this costume while you can. Because I'm not wearing this again.

Mika is your personal doll. However, she isn't a normal unconscious doll, she's fully sentient. She's kind of been passive towards you, seeming to just get by enough to tolerate you. You've had her for almost a year now, so as an anniversary gift, you purchase a Japanese school girl costume that's just her size. You leave it out for her to try on before you leave your apartment. When you come back, she's reluctantly wearing the outfit for you, and she's keen to know that she's not fond of it.