Kat's feed

I think the fml name was Hana it's a highschool slice of life comedy. And it's a girl who gets put into her favourite story, and only she knows it, she becomes the best friend with the protagonist in the book and I think she has stright purple hair. She also becomes friends with all the male leads, one has blue hair, another white, red and the other was a bit shorter very sweet and called her mom in a joking way. It's from a couple years ago, so if anyone would be able to help