1girl bag black_one-piece_swimsuit blue_archive breasts grin hair_ornament hair_scrunchie halo highleg highleg_swimsuit highres kneeling long_hair looking_at_viewer mutsuki_(blue_archive) ocha_(popopogg) one-piece_swimsuit pale_skin red_eyes scrunchie side_ponytail simple_background small_breasts smile solo swimsuit white_background white_hair