yurarin, hiyajou maho, science adventure, steins;gate, 1boy, 1girl, :d, black hair, blush, book, collarbone, cowgirl position, dot nose, girl on top, green eyes, half-closed eyes, hands on another's hips, heart, heavy breathing, implied sex, jacket, long hair, lying, motion lines, on back, open mouth, sitting, sitting on person, smile, spread legs, straddling, thick eyebrows, thighhighs, v-shaped eyebrows, very long hair, white thighhighs