Good god, so many complainers here. Is it really that bad when Mashima re-uses a character? Jellal was a reused Sieghart Caeser and it worked. Many elements from Fairy Tail was re-used from Rave Master, like Oriacion Seis, Etherion, etc. I can't see how the same can't happen here.
It starts like your usual Isekai - full of time skips because the author can't be bothered to show organic character growth. Nevertheless, the story is chill and cute. I like it.