art by yellowroom, 1girl, abs, blue skin, blush, breasts, collarbone, colored sclera, colored skin, cowgirl position, cum, cum in pussy, eyelashes, eyepatch, fins, girl on top, hair over one eye, half-closed eyes, head fins, heart, hetero, high ponytail, highres, lips, long hair, midriff, monster, monster girl, muscular, muscular female, navel, nipples, nude, ponytail, pussy, red hair, sex, sharp teeth, shiny skin, small breasts, solo focus, spread legs, stomach bulge, straddling, sweat, teeth, uncensored, undertale, undyne, vaginal, watermark, web address, yellow sclera, 