+ +, 3girls, :d, ?, ahoge, arm support, black hair, black tail, book, bow, breasts, brown hair, brown horns, cleavage, closed eyes, collarbone, curled horns, demon girl, demon horns, demon tail, excited, fang, furrowed brow, hair between eyes, hand up, heart, heart tail, horns, indoors, long hair, looking at another, lying, multiple girls, nervous smile, on stomach, open book, open mouth, pajamas, pink pajamas, reading, red bow, shirt, siblings, sidelocks, sisters, smile, sparkle, sunset, tail, under covers, wavy hair, white shirt, wide-eyed