1boy, 1girl, arms_behind_back, averting_eyes, bare_shoulders, black_hair, black_shirt, blue_one-piece_swimsuit, blue_sailor_collar, blush, bow, brother_and_sister, closed_mouth, collarbone, comic, competition_school_swimsuit, covered_navel, covering_mouth, cowboy_shot, dutch_angle, embarrassed, expressionless, flat_chest, grey_eyes, grey_hair, hair_between_eyes, hair_bow, hamaken._(novelize), hip_bones, holding, holding_pillow, indoors, long_hair, neckerchief, no_eyes, one-piece_swimsuit, open_door, open_mouth, original, pillow, pointing, red_neckerchief, sailor_collar, school_swimsuit, school_uniform, serafuku, shirt, short_hair, short_sleeves, siblings, standing, surprised, swimsuit, thighs, v-shaped_eyebrows, white_shirt