Can an Earthling Marry an Interstellar Wife?

Pei Qing used to think that settings like Sentinels and Guides only existed in Omegaverse fiction. That was until he found himself in the interstellar world, where he landed as a Sentinel. Pei Qing: ... Tonight, he was saying goodbye to Mother Earth and setting off to become a background character in an Omegaverse novel. He was suddenly excited. But after learning more, he discovered that being a background character in Omegaverse fiction wasn't so easy. He couldn't get used to the food, the clothes, or the studying... and that was just the start of his culture shock. Most importantly, his bank balance wasn't having it. Pei Qing: I'm done for. So that he wouldn't have to risk his life serving in the military, and so he could get used to all these things eventually, Pei Qing had to abandon his original plan to stay in the background and look for a part-time job instead. He'd do anything to make a living! (shouts) Then, with Mother Earth's blessing, an interstellar resident appeared out of nowhere and smiled as he offered to pay Pei Qing, in exchange for his soul (?). How was that any different from being kept? No, his employer wouldn't make a move on him. He was probably just after that handsome face. Pei Qing, well aware of his own good looks, glanced at his dashing, debonair, irresistible face, then at his bank balance, which was even cleaner than his face, and reluctantly accepted. The other perspective: Everyone at Noxus Academy knew Pei Qing was an S-rank Sentinel. They all knew he was powerful, gentle, and easygoing, yet kept an unapproachable distance from anyone who tried to get close to him. Some suspected he was a secret heir, carefully protected by one of the great houses. Others said he was an orphan of war, while still others thought he was a dirt-poor immigrant who'd struck it lucky. No one knew where he came from, just as no one seemed able to truly enter his heart. All along, not even the gentlest, most harmless Guide could make him open his mental landscape. He was even harder to approach than Sedar, who came from a noble family. Many Guides longed to tame him, or be conquered by him and become the other half of his soul. But no one succeeded. Most were stopped in their tracks by the sheer force of his S-rank presence. Only Vicente, reborn into a new life, knew what Pei Qing needed most at that moment: money and status. As it happened, Vicente needed a helper, a partner to cover for him. So he held out his hand to Pei Qing. Vicente thought Pei Qing would take a long time to consider it, or make him prove himself for a long time before agreeing. What he didn't expect was that when he first invited Pei Qing, the Sentinel everyone thought unapproachable, the Sentinel who would one day truly illuminate the history of interstellar warfare, thought it over for just a moment before readily accepting. A somewhat mischievous, slightly shameless Earthling Sentinel top and a beautiful, somewhat face-loving interstellar Guide bottom. A wonderful union between Earth and the stars (?). One-on-one, both leads' first relationship. Content warnings: 1. The bottom is reborn. In his previous life, he dated someone else for a month. 2. The top doesn't return to Earth. 3. There are impostors. Please be a little forgiving toward the villains. 4. This is Sentinel/Guide, not Guide/Sentinel. Theme: Join hands to create a brighter future together