@Halo, alright here's my understanding of the gacha system
You get characters and weapons from pulls, what I thought was going to be the gacha currency isn't actually it, it's another type of currency. You get these items that are rare (because they only give you 10, unlike for example FE Heroes, where for each summon you need 5, needing only 20 if you summon 5 heroes in a row) and you only need 1 for each pull, and there are 2 types of summoningyou have currency, which right now I don't know how to get. You have a team of 4 member, but you can make multiple teams and MC doesn't have to be included.
I got 3 characters and like 8 or 12 weapons, but 4-5 of those weapons were duplicates, BUT, extra weapons and other resources can be used to upgrade your weapons to make them stronger. That's my report so far.
(In terms of waifus, I got 3 waifus, very kawaii and all, and by completing the main mission, I get a Witch, i don't know man, it's hard to win against that.)