1girl, ass_visible_through_thighs, barefoot, bed_sheet, black_panties, black_sports_bra, blush, brown_hair, collarbone, dakimakura_(medium), feet, full_body, legs, lying, navel, on_back, open_mouth, panties, pillow, revenantart, seto_akari, smile, solo, sports_bra, sports_panties, toenails, toes, underwear, urasekai_picnic