kou (ahondnara), seto sun, seto no hanayome, bad id, bad pixiv id, highres, 00s, 1girl, bikini, breasts, brown eyes, brown hair, caustics, cleavage, colored skin, female focus, floating hair, hair spread out, kneeless merfolk, leaning forward, looking at viewer, merfolk, mermaid, monster girl, partially submerged, ripples, scales, shell, shell bikini, sidelocks, simple background, small breasts, solo, submerged, swimsuit, v arms, water, white background, yellow skin