It’s a BG QT novel where the mc takes on the role of a cannon fodder/villainess + sized, and her task is to promote the feelings between the main couple by acting out the expected scenes? She doesn’t do well and ends up with the ML of the story. She is the childhood friend of the ML, who was friends with her brother. She doesn’t change her weight or anything so it stuck out. They meet at a coffee shop where she acts out the hug scene and tries to quickly ditch after. FL is a waitress fake white lotus kind. There’s another arc where the female lead is some kind of plant monster and she helps the ML’s health. ML might be the same. I remember finding it on either spoilers or recommendations, but that’s about it.