A hole in my chest

I will talk about one of my favavorite anime. (Literally remembering this I get goose bumps)

Clannad, VN, manga, movie and anime, realized in 05, 05, 07 and 07 respectively; narrate the history of Okazaki Tomoya.

Tomoya hates his life. His mother died when he was young, because of this, his father became an alcoholic and a gambling addicted. Tomoya had problems with his father because of his problems. Tomoya hates his life.
One day he meets Nagisa Furukawa, he decides help she to reform the drama club because he have lot of time to kill. He didn't know with this decition will chage his life. During this period, Tomoya meets other girls (yes, it's japan, what did you expected?), all with her own internal problems.