2girls, 5koma, ?, aged_down, alternate_costume, arknights, blue_eyes, blue_hair, comic, horns, ling_(arknights), long_hair, midriff, multiple_girls, navel, nian_(arknights), siblings, simple_background, sisters, spoken_question_mark, standing, stomach, strapless, tube_top, very_long_hair, white_background, white_hair, zuo_daoxing