1girl, arms_behind_head, black_hair, black_one-piece_swimsuit, blue_one-piece_swimsuit, blush, breasts, headgear, i-400_(kancolle), kantai_collection, kitahama_(siroimakeinu831), long_hair, looking_at_viewer, one-piece_swimsuit, one-piece_tan, open_mouth, orange_sailor_collar, sailor_collar, sailor_shirt, school_swimsuit, shirt, side-tie_shirt, sleeveless, sleeveless_shirt, small_breasts, smile, solo, swimsuit, swimsuit_under_clothes, tan, tanlines, twitter_username, white_background, white_shirt