Any Quick Transmigration Novels with a Secret-Identity Narcissistic Romance?

I'm looking for a quick transmigration story featuring secret-identity selfcest. The protagonist acts out melodramatic plots in different secret identities to attract attention. I remember one school arc where the original male and female leads were doing something in the bathroom, though I've forgotten what. Someone reported them, then the protagonist and the other two came out of the bathroom, shocking their classmates.