1boy, 1girl, alternate universe, backpack, bag, cd2fm, cellphone, collared shirt, comic, contemporary, dog, facing away, flower-shaped pupils, greyscale, hakuji (kimetsu no yaiba), holding, holding bag, holding phone, jewelry, kimetsu no yaiba, koyuki (kimetsu no yaiba), monochrome, necktie, out of frame, pants, phone, photo (object), ring, school uniform, searching, shirt, short hair, short sleeves, side-by-side, skirt, sleeping, smartphone, symbol-shaped pupils, timestamp