Hanako's feed

For as much as I remember, she's a pushover and now she lives in the body of the villainess. I also remember I liked the story because she's trying to be mean but her inner thoughts are so funny cuz she's such a coward she doesn't know how to handle the situation other than acting "in" character. Then the story shifted, we now know the Pink haired lady, the original protag, is just another trap who pretends to be kind but was actually rotten. At the same time, there's an information dealer who was actually the male lead with different persona. Ok. Now enlightened me what's the story all about again???