This was really good anime about a boy who wants to be a girl, and a girl who wants to be a boy. Sadly, it's a lot easier to be a girl, since it's fine for girls to wear trousers, but if boy wears a dress, he's a sick pervert.
Normally in anime, genderbending is just a source of humor. In WanSon, it's serious.
I'm sad that this is not really popular in CR, there's lots of bad harem series