You receive a strange opportunity.
You can enter any completed anime universe, but you arrive exactly one day before its final episode.
You know everything that happened throughout the series.
You can interact with characters, give advice and influence their final decisions.
However, you only have 24 hours.
Would you:
Prevent a tragic ending?
Reveal a secret nobody discovered?
Help a character achieve their dream?
Or leave the story untouched?
Which anime would you enter, and what would you change during those 24 hours?