New Wave Guide

if by download, you mean downloading the game, then there's actually nothing to download aside from a google chrome extension. there's actually a separate thread specifically for signing up for the game, but you'll want to visit mbga.jp on your phone (or through google chrome by spoofing a mobile browser by using a browser switching agent) it's best to do it through chrome because of the translation feature, which'll help with navigation.

Does anyone know where i can find a story summary for the teams? like how they interact with other team members and rival schools?

You don't need to create an account cuz you can use Facebook or twitter account, and it's odd because it should work fine. Are you sure you downloaded both of the extensions for Chrome?

No because to try them you have to pay and honestly I tried only once the bust up gacha.

...I do not have the file space for all of this.

I just need more info on four teams actually. maisen, their rivals and their rivals at shinozuka, and the new hebijo girls and the arc angels. specifically how their rivalries and inter team dynamics are. more info on Yoshimitsu and matsuri's characters as well. its a mobile game so im not exactly expecting a lot of character, but man am I curious.