1girl arms_behind_head bikini black_bikini black_choker black_hair blush breasts brown_eyes check_commentary choker cleavage closed_mouth collarbone commentary commentary_request dripping girls_und_panzer highres kawashima_momo looking_at_viewer monocle navel short_hair side-tie_bikini_bottom simple_background small_breasts solo sweat swimsuit white_background yachi_(fujiyasu0616)