penguin potof, rena (blue archive), blue archive, highres, 1boy, 1girl, black ribbon, black skirt, blush, brown eyes, brown hair, cardigan, cervix, clothed sex, cowgirl position, cross-section, girl on top, grey background, hair between eyes, hair ornament, hair ribbon, halo, hetero, long sleeves, looking at viewer, multicolored hair, navel, open mouth, penis, pov, ribbon, sex, simple background, skirt, skirt around one leg, solo focus, speech bubble, straddling, streaked hair, sweat, twintails, uterus, vaginal, x hair ornament