After Being Kidnapped into Marriage by Space Pirates

The pampered Omega of the Murong family is abducted at his engagement banquet by a notorious space pirate. He faints on the spot, and when he wakes up, someone else is in his body. Murong Pei, now transmigrated into this world, discovers that the space pirate is his deceased lover! Murong Pei: "General, don't you think you owe me an explanation?" Space pirate: "Uh..." How is he supposed to explain that he had no improper intentions toward the original owner? He only wanted to abduct someone who looked exactly like him, so he could gaze upon him and remember the one he'd lost? Please note: [1] Space setting, ABO, childbirth, sweet romance, one-on-one, happy ending [2] Domineering, devoted space-pirate top x delicate, intelligent bottom, Alpha x Omega [3] The bottom transmigrates from ancient times to the modern era. He loses his memories of before transmigrating at the start, but gets them back later. [4] The top transmigrates from the modern era to ancient times and becomes a great general, then transmigrates back. He remains in his own body throughout. Theme: