Restore
You loiter around a black hole, waiting for it to finish destroying stuff so you can switch it to restore mode. You were told all black holes finish eventually, and when they do you can press a button to restore everything back to the way it was.
ふく
None
None
When there's nothing else for the black hole to eat, you hit the restore button.... but nothing happens. "Oh, f**k (ふく) you!" you scream, as you realize you were lied to.
An update is needed before you can continue but you have more than one WaniKani tab open.
Finish up what ever you are doing on the other tab(s), then close them to continue.
The update will complete automatically once the other tab(s) are closed.