1girl, arm_behind_back, ass_visible_through_thighs, bare_arms, bare_shoulders, blue_hair, blue_one-piece_swimsuit, breasts, collarbone, covered_navel, cowboy_shot, door, finger_to_mouth, green_eyes, light_blush, long_hair, looking_at_viewer, momoku, one-piece_swimsuit, onii-chan_wa_oshimai!, school_swimsuit, small_breasts, smile, solo, swimsuit, tenkawa_nayuta, thighs, toilet_stall