abubu, original, translated, 1boy, 1girl, age difference, bed sheet, blush, breasts, brother and sister, brown hair, closed eyes, collarbone, grabbing another's breast, groping, hair ornament, hairclip, hetero, incest, kneehighs, kneeling, large breasts, legs, long hair, onee-shota, open clothes, open shirt, school uniform, serafuku, shirt, short hair, shota, siblings, skirt, socks, teenage girl and younger boy, undressing