I was drawn in by the cast (what can I say? I have a soft spot for Kaho! ^___^) and by the deeply interesting premise (I'm a sucker for such time-related stories...so much so that, despite all my disdain for post-1980 hollywoodian productions, I'd still consider "recent" American movies like "Frequency" and "12 Monkeys" for a hypothetical personal top-100 of all time!), and indeed, Kaho is adorable here, and the plot is absolutely gripping.
The thing that really makes this movie stand out, though, is the beautiful message it conveys: that self-realization, as well as personal growth, can come through selflessness and caring for others. Such a lovely message indeed, particularly when the society we're living in, unfortunately, constantly encourages sociopathic behaviors instead (all is good as long as you don't bother the powers that be!), of course edulcorating them with sugarcoated definitions as "having a strong personality" (used for "being an arrogant ego-maniac") and "being competitive" (used for "trampling over others")...
That's why I wholeheartedly suggest this hidden gem: it's the soul equivalent of a warm, fuzzy blanket on a cold, dark night! ^___^