Archrivals

Are There Any Books About Archrivals Who Love and Fight Each Other?

No Systems, being reborn, mindless power fantasies, transmigrating to another world, transmigrating into someone else's body, everyone doting on the protagonist, fake heiresses, invincible leads, school life, raising children, past and present lives, transmigrating into a book, wealthy families, palace intrigue, household intrigue, running away while pregnant, angst. The leads don't have to love each other, but they must be out to destroy each other. Infinite-flow, strong leads.