Der Zitteraal: Dengeki seibucu (S01E08)

Adolf and No. 5 Division head toward the main ship of the Annex in the rain. But then, they unexpectedly get rammed by No. 4 Division's ship, and are grounded. While getting ready to face the horde of terraformars outside, Adolf remembers his past. He remembers his sad past, undergoing the M.O. operation... and then one day, someone changed his life forever. (Crunchyroll)