As for bg, in fact, the male and female protagonists are not very yandere, the male protagonist is a bit crazy (the kind who is afraid of being left behind), and I like the female protagonist's setting (seemingly ruthless but affectionate).
It's a story about a heroine with an ancient background. It's a story about power cancer (me too). It's not a story about a strong female protagonist, Su Shuang, in the traditional sense. It's more like a Machiavellian story. It hurts my brain.
GB Xiang (Okay, writing this, I noticed something is wrong, the GB concentration is so high, isn't this right...) The background of the interstellar world, the heroine baby Ani is a very powerful mimic beast (tentacle monster), 1vn, the female is not a male virgin. Compare the settings of Chi Lin (mermaid) and Ling Xiao (vampire vine).