The Heroine is My Stepsister, and I'm her Final Boss - Chapter 121: Primes

Getting transmigrated inside a novel is not really a bad thing—you know the story, you have the power of the future in your hand, you know all the hidden keys. You might as well end up as the most powerful and omniscient being in that world.That is, if you don’t wake up during the epilogue.And yet I find myself in the body of a fallen priest at the end of the novel, a tragic hero who had his mana circuit broken in the last war, being shunned, drown in debt, and destined to die not long after.Fortunately, I know just the cure.Unfortunately, the cure was in the hand of one of the Demon Lords—you know, the race that my kingdom just wage war with.Would he give me the cure if I asked him politely? There’s no harm in trying, right? I’d die if I didn’t get the cure, anyway.“Sure, but you have to be my bride as the price,” the Demon Lord said....huh? Sir, you know I’m (technically) a priest, right?

Xue Xi is forced to fall in love at first sight with this dangerous man on their first meeting. With death being the only other option, she makes the first move:

A part-time job contract. He became the cold CEO’s imitation boyfriend. He merely wanted to earn a few small bucks and live a comfortable life, but a pity, he was in constant turmoil since then. Well, life had something else for him despite his wishes.“That… beauty, will there be an increase in wages for conversion from ‘boyfriend’ to ‘husband’?”

The alien DNA is the best thing that has ever happened to Ye Shuang because the genetic optimization it offers has made her more beautiful, more formidable, and more brilliant.

But… why doesn’t this unknown alien species have a fixed s*x before adulthood‽ Alternating between both sexes every few days, why‽ For gender equality‽ Thankfully, she still has a chance to save herself. As long as she can settle down with a partner before full genetic assimilation, she’ll be able to carry on with her life as just one specific sex. For the sake of the perfect female body, all the men out there, beware!

But wait, what are all these women up to? Why are you all looking at me like a piece of meat‽ Halt, stop, don’t come any closer… What the hell‽

- Description from Novelupdates