4girls, abyssal_ship, black_hair, blue_eyes, blue_headband, blue_swimsuit, book, brown_eyes, dated, drill_hair, gradient_hair, hair_between_eyes, hat, headband, holding, holding_book, light_brown_hair, long_hair, low-tied_long_hair, mitsukoshi_(department_store), multicolored_hair, multiple_girls, one-piece_swimsuit, open_mouth, purple_eyes, purple_hair, sailor_hat, school_swimsuit, short_hair, side_ponytail, swimsuit, white_hair, white_headwear, window, yellow_eyes