The ghost was looking around and decided to look at a small little middle school. He saw a group of kids bullying a smaller kid. Seemed like they were making fun of him cause he was small and hadn't even had the smallest hint of puberty and was pretty small.
The more leader said "Hey little Joe what's the matter don't you have any muscles?" he then shoved Joe and said "What are you a little girl posing as a boy? If you want to be a big boy you gotta stand up."
Joe wasn't standing so the guy said "Stand up, I'd hate to have to kick you while your down."
The ghost heard the idea of Joe being a girl posing as a boy and decided to transform the boy so he entered the kids body. The ghost decided to change the boy slowly so nothing to noticeable at first. The boy's balls stopped being sperm factories and instead ovaries were starting to form inside, although he still had a penis. His hips also started to expand ever so slightly, and his chest was starting to get a little fat.
Some kid told the leader "Let's just leave him."
the leader said "Yeah, this isn't even fun... Oh yeah tomorrow let's get together. The arcade has a special on weekends." They then left Joe who got up and for some reason felt kind of different. He then went to his final class of the day. P.E.