rotocrush, sensei (blue archive), yuuka (blue archive), blue archive, commentary, highres, 1boy, 1girl, all fours, arm up, armpit crease, bite mark, bite mark on breast, blush, breasts, buruma, closed eyes, completely nude, deep skin, doggystyle, dutch angle, grabbing another's breast, grabbing from behind, groping, hair between eyes, halo, hetero, knees out of frame, large breasts, long hair, mechanical halo, navel, netorare, nipples, nose blush, nude, open mouth, purple hair, reverse netorare, role reversal, saliva, sex, sex from behind, shirt, sidelocks, skindentation, stomach, sweat, teeth, two side up, upper teeth only, wavy mouth