Can't we just skip to the end? (слэш)

When it was all said and done, Shen Qingqiu comforted himself that the end of the plot meant that, surely, all major events were out of the way. They were firmly in HEA territory and he could relax a little. Right? Right.
A year and a half into his marriage to the protagonist, he cursed himself for a fool when he woke next to a Luo Binghe from ten years in the past.
Meanwhile, a recently transmigrated Shen Yuan struggled to retain what little face he had when confronted with an overgrown, disturbingly gorgeous demon lord claiming to be his husband. Which is impossible, because he’s straight, the most hetero heterosexual to exist. System? A little help here??