So, it was fine because it deleted a bunch of files first. I checked, the file is normally 10 gb, but it was about 5 before this update. So it updates fine
The updates:
An event with a new minigame (like the Code Box event)
a lot of Highland school furniture added
a new recruitment system
new characters (totally 3, It's Hikari, Nozomi and Aoba)
a new Pyro shop
tasks to earn Archived recruitment tickets