Weren't I Supposed to Be Cannon Fodder? Why Is the Villain Calling Me His Wife?

[Two male leads + both virgins, both powerful + a touch of harem vibes + alternate apocalypse + a touch of Lovecraftian horror + satisfying power fantasy] A goofy, flirtatious beauty as the bottom and a cold-faced, inhuman commander as the top Shen Zhixian was a hapless wage slave dragged in by a System. In his previous life, his prospects had been so bright that he was struck dead by lightning. Then he transmigrated into an apocalypse. In the original story, he was the real young master, a pitiful disposable extra whose father didn’t care for him and whose mother didn’t love him. His fiancée betrayed him, and he even smiled and forgave her. On his first day after transmigrating into a book, the System told him to help the protagonist escape danger. Looking at the pitiful-looking real protagonist, who was actually the fake young master, and his fiancée beside him, he sighed at the heavens: “As your big brother, the only thing I can do is let the two of you die with dignity.” The protagonist: ??? The System: [???] Shen Zhixian knew full well that whenever the protagonist was in danger, a golden finger would automatically appear. So whenever the protagonist, Shen Bufan, wasn’t in a bind, he’d create one for him. If there was no danger, he’d make some. Because he was too kindhearted, he even landed on the safe zone’s list of people to avoid at all costs. However, the top commander in this world turned out to be his old nemesis from his previous life, Qi Jingyan. Fortunately, Qi Jingyan had no memories of it. Unfortunately, they clashed the moment they met. But this commander’s supernatural ability had a side effect: only absorbing Shen Zhixian’s mental energy could ease it. They were at odds in public, but cuddled up together behind closed doors. He thought that was as wild as things could get, but the plot only grew more deranged: The captain of the main force looked at him with an unmistakably suggestive gaze and hoped every day that his fiancée would die. The legendary cold-blooded merfolk was willing to shed blood and turn it into pearls just to make him smile. The lunatic chief judge tried every way he could to keep him all to himself... But what shocked Shen Zhixian most was waking up one night with his old nemesis’s tail wrapped around him: “Baby, wouldn’t you rather look at me and only me?”