Arumi is climbing up into one of the 250 mm triple gun turrets on the OPS seen here https://www.deviantart.com/ryuukei8569/art/Heavy-Orbital-Protection-Ship-855230897. And she is giving us a nice tail and butt shot, not that she cares anyway.
www.patreon.com/ryuukei8569 Here is my Patreon for early access to my stuff.