gekkou ookami, kotona elegance, ruuji familon, zoids, zoids genesis, 00s, 1boy, 1girl, age difference, bent over, blush, bottomless, breasts, breasts out, closed eyes, doggystyle, drooling, goggles, goggles around neck, greyscale, hetero, humping, large breasts, lineart, long hair, medium breasts, monochrome, motion lines, nipples, oekaki, open mouth, parted lips, sex, sex from behind, short hair, shota, signature, simple background, sweat, teenage girl and younger boy, vaginal, white background