Hi! As of now, there are no endings with the girls or anything of the sort, not even in the Spanish version, because the game is still in development (and will be for quite a while). At most, you can follow a few different routes to see events that are unique to some of the girls. Likewise, I don't have a guide per se, but if you are interested in seeing the specific events of a certain girl, I can provide some pointers or tell you the exact choices you need to make. So as not to spoil things to other players, you can just give me some private contact info, and I'll be happy to oblige.
Cheers!