daichan mona, original, bad id, bad pixiv id, 1girl, armpits, arms up, bikini, blonde hair, blue bikini, breasts, brown eyes, female focus, frown, hair ornament, hairpin, lace, lace-trimmed bikini, lace trim, large breasts, lips, long hair, mermaid, monster girl, night, ocean, outdoors, polka dot, polka dot bikini, polka dot swimsuit, scales, solo, sparkle, swimsuit, tail, underwater, water, wet, wind