You pretty much need to play using a controller since the M + K barely works and if you want to make any form of progression just buy the "Item booster" dlc. Make sure you equip and level up the vtuber cubes, they're the main way you can actually deal any damage and make the game somewhat playable so you don't spend 2 minutes fighting enemies that are 20 levels higher.

Once you're properly levelled and upgraded this doesn't feel AS garbage but it's still probably the worst game in the whole series.

It took me until today to actually finish this and I bought the limited edition version on release.

Unless you're a big Vtuber fan (Which I'm not)
Or a massive Neptunia fan (Which I am)

I straight up wouldn't bother playing this one, but at least it's short....