!?, ..., 1girl, 2boys, alternate universe, backpack, bag, blush, cd2fm, cellphone, closed eyes, collared shirt, comic, contemporary, crescent, embarrassed, facial hair, flower-shaped pupils, full-face blush, greyscale, hakuji (kimetsu no yaiba), half-closed eyes, hand blush, hands up, holding, holding phone, keizou (kimetsu no yaiba), kimetsu no yaiba, koyuki (kimetsu no yaiba), monochrome, multiple boys, pants, phone, school uniform, shirt, short hair, short sleeves, skirt, spoken ellipsis, stubble, surprised, symbol-shaped pupils, trembling, ufo