![1girl ahoge arm_at_side azur_lane bangs black_shorts blonde_hair blue_eyes blush breast_tattoo breasts center_opening cleavage_cutout commentary_request covered_navel from_side gradient_hair grin groin gyaru hey_taishou highres id_card large_breasts looking_at_viewer manicure marblehead_(azur_lane) multicolored_hair navel navel_piercing piercing purple_hair short_hair_with_long_locks shorts sidelocks sketch smile solo standing tattoo rating:s score:16 post #3855732](/cdn_image/preview/80/9c/809c286db5041972bde2bc89ccfbda68.jpg)
When one arm is at rest on its side of the body, while the other arm is doing something else such as being spread out, reaching out, on the hip, behind the head, and so on.
If both arms are at rest on both sides, use the plural arms at sides instead.