ERASED

Boku dake ga inai machi, best known as ERASED is one of the best animes I've ever seen. It tells the story of an adult who has the ability to go back in time and so, he has the chance to save some people who don't get to live that long (in particular a girl that he didn't talk to that much). «The city where only I don't exist»- I mean, most people could relate to this. Everyday we see new faces, everyday people give up on life because they don't have friendship or love. This was an intense anime because it tells that you gotta do what you gotta do. Don't have second thoughts. If you want to talk to that boy/girl, talk to that boy/girl, if you get rejected, you got rejected. At least, when your life ends you'll have no regrets and you'll know that you lived a great life.
And they say anime is for kids...