okano rikiya, game center shoujo to ibunka kouryuu, official art, 3girls, anime coloring, back, black socks, blue ribbon, blue skirt, blush, boots, breasts, brown boots, clenched hand, closed mouth, collared shirt, from behind, from side, full body, hair ornament, hairclip, half updo, hand up, high-waist skirt, large breasts, long sleeves, looking at viewer, mochizuki momoko, multiple girls, multiple hair clips, multiple views, ribbon, shirt, sidelocks, simple background, skirt, smile, socks, standing, transparent background, white shirt