MC (FL) was sent to an another family where she met her sister (not biological) but her parents bully her sister a lot so she decided to fake bully her with out her noticing
But the sister found out anyways but she kept it secret because FL is trying very hard for her not to be abused
Proud to be the Villainess: I'm Doomed After Stealing my Half-Sister's Fiancé and Having Her Banished