viper (series), viper rsr, animated, animated gif, character request, game cg, looping animation, 1boy, 1girl, ass, back, blush, bouncing breasts, breasts, censored, closed eyes, dimples of venus, erection, girl on top, glowing, glowing eye, green hair, happy sex, hetero, hug, humanoid robot, machine, mecha on girl, mechaphilia, medium breasts, mosaic censoring, nude, open mouth, penis, pussy juice, robot, sex, short hair, sideboob, sitting, solo focus, straddling, upright straddle, vaginal, what