A public transit or station corridor is shown with glass doors, bright overhead lighting, and a person low to the ground near the entrance; the school-context caption makes this a sensitive scene, so intimate details are not described. Likely next moment: the person gets up or someone nearby offers help.
愛禾 @aika_ksrg

駅構内でおしっこもらしちゃった女子高生。 通行人に見られて、恥ずかしそうにしてる仕草が堪らないですね☺️