mochizuki riku, serika (blue archive), blue archive, commentary request, highres, 1girl, animal ear fluff, animal ears, black hair, black sailor collar, black skirt, blue neckerchief, blue ribbon, blush, breasts, cat ears, cat girl, closed mouth, cowboy shot, dated, gluteal fold, hair ribbon, halo, hands up, long hair, looking at viewer, miniskirt, neckerchief, pink eyes, pink halo, pleated skirt, ribbon, sailor collar, sailor shirt, school uniform, serafuku, shirt, short sleeves, signature, simple background, skirt, small breasts, solo, twintails, very long hair, white background