happoubi jin, tsukushino mitsugu, boin, boin lecture, board, wall, game cg, 00s, 1girl, ahoge, arms behind back, bare shoulders, blonde hair, blue eyes, blush, breasts, bulletin board, ceiling, ceiling light, chair, chalkboard, classroom, cleavage, female focus, floor, hair down, hakama, hakama skirt, half-closed eyes, huge breasts, indoors, japanese clothes, kimono, large breasts, long hair, looking down, miko, moaning, nipple slip, nipples, no bra, off shoulder, on chair, open mouth, partially undressed, presenting, red hakama, room, sitting, skirt, socks, solo, spread legs, teeth, tongue, undressing, white kimono, white socks