Kimi ga Waratta(1995)

Kimi ga Waratta

Mai, a quiet girl who is thought of as gloomy by her classmates, does kind deeds in secret. Narumi is surprised to find this out, and even more surprised when he realizes the impression he made on her for his own small deeds.

Includes the one-shot: 1/6000 Honesty
At the age of sixteen, you've lived for about 6000 days... for how many of them were you truly honest? Tomoko regrets that when she was a teen, she didn't confess to the boy she loved and he was taken by another girl. When she gets hit by a car, she gets the chance to watch her past unfold again, and maybe even change it.