Mister Sister: A Magical M2F Transformation Tale

When Caleb gets home from college, he gets a big surprise--his dad has remarried, and so he has a new step-sister. Problem one: He doesn't want a new step-sister! Problem two: She has taken over his room and now he has to sleep on the couch! Problem three: It sounds like she might be a witch...the sort who would take revenge if she caught you snooping in her room.

But when she does decide to take revenge on Caleb, it's by turning him into a girl...and setting him loose on her own boyfriend Logan! But Caleb's not going to take this transformation lying down! ...wait, no, he IS going to take it lying down, and being on top, and any way he can!