An anthology with a different protagonist in each story.
Before the plot forcibly turns a supporting female character stupid, what if the heroine met her before she met the male lead? How would their story change? (There are no past lives, just a parallel world where things might have happened differently.)
Two female leads: girl and girl. This is not romance between a man and a woman, nor is it a story about two men.
If you came here by mistake, leave now, leave now, leave now.
World One: Tsundere fake heiress and sweet-faced, dark-hearted real heiress
World Two: To be decided
