1girl, animal ears, anniversary, black gloves, black ribbon, black shirt, blue hair, blue skirt, cat ears, chest harness, ear piercing, english text, flat chest, floral print, from side, gloves, hair ribbon, hands on own cheeks, hands on own face, harness, high collar, long hair, long sleeves, milestone celebration, night, night sky, official alternate costume, official alternate hairstyle, piercing, ponytail, ribbon, rose print, shirt, sidelocks, skirt, sky, solo, virtual youtuber