1girl, air bubble, blue hair, blue sailor collar, blue skirt, blunt bangs, bob cut, bubble, dot mouth, fish, from side, grey shirt, indoors, leaning back, long sleeves, looking at viewer, neckerchief, pleated skirt, rope, sailor collar, school uniform, serafuku, shirt, short hair, sidelocks, skirt, solo, star-shaped pupils, star symbol, symbol-shaped pupils, tile wall, tiles, underwater, white neckerchief