Some romance conventions are so popular that they can become old hat if they're not written really well. One way to keep these romance clichés fun and fresh is by turning them on their head by unpacking them and inverting them to subvert expectations. An anime may set up a character to be a stock tsundere only to show that they are the complete opposite upon further examination.
Source：https://www.cbr.com/romance-anime-surprise-viewers/
