1girl, bed, blue_one-piece_swimsuit, blush, breasts, covered_navel, hair_bobbles, hair_ornament, hand_on_own_chin, indoors, kantai_collection, looking_at_viewer, lying, on_back, on_bed, one-piece_swimsuit, pillow, pink_eyes, pink_hair, sakieko, sazanami_(kancolle), school_swimsuit, sheet_grab, short_hair, short_twintails, small_breasts, solo, swimsuit, twintails