This is one of those rare animated films that treats its audience with intelligence and respects that teens can handle complex emotions. The time-travel mechanic is clever, the animation is beautiful, and the character growth feels earned rather than forced.

That said, this isn't Pixar-level accessibility. It's quieter, more contemplative, and distinctly Japanese in its storytelling rhythm. If your kid is used to constant action and quippy dialogue, they might find this slow. But if they're ready for something with actual emotional depth and philosophical questions about choices and consequences, this delivers.

The 2006 vintage actually works in its favor—the animation style has aged gracefully, and the lack of smartphones makes the time-travel premise less complicated. It's held up better than many Western animated films from the same era. Still totally watchable today, especially for kids who are getting into anime or want something more substantial than typical animated fare.