awatake takahiro, original, 00s, 2008, 2girls, :o, aquarium, arms up, bikini, bikini tan, black hair, blue eyes, breasts, brown hair, bubble, bush, cloud, costume, dated, floating, ladder, looking at viewer, lowleg, medium breasts, mermaid, mermaid costume, midriff, monster girl, multiple girls, narrow waist, navel, one-piece tan, outdoors, pasties, rooftop, scales, seashell, shell, shell bikini, shells, short hair, sky, smile, submerged, tan, tanline, tape, underwater, upside-down, wardrobe malfunction