The Abyss Descends, and the Gods Taste Good

(Rebirth + system + decisive killing + multiple female protagonists) The abyss is coming. How can Blue Star on the technological side resist the invasion of the mysterious side? How does Gawain, who is infected by an unknown existence, change his own destiny and that of those around him? [Ancient God: You can choose the direction of your genetic evolution. Are gods strong? Give me a bite and it won't be strong anymore.