No, he won't get turned into a girl in a future episode. However, I will be introducing the BTM: Bio-Energy Transfer Machine, and Michi's girlfriend. The former will make Benji older for a brief time and someone else - Michi, Angie, Scarlett etc. - younger, and he gets to turn the tables on them! Angelina (Angie) will be revealed as Michi's girlfriend, then she moves in and they get engaged, and finally married. Of course, there are LOTS more stories that'll go along with that. So, you'll just have to wait and see all the fun.