2girls, animal ears, birthday, birthday cake, black hair, blonde hair, blue shirt, cake, cat ears, chair, chibi, clothes writing, cosplay, crossover, food, grey background, grey pants, hair ornament, hairclip, light, looking at viewer, mouse ears, mouse girl, multicolored hair, multiple girls, on chair, open mouth, pants, red hair, shirt, simple background, size difference, standing, standing on chair, streaked hair, table, twintails, virtual youtuber, what, white hair