I usually don't watch animes

I happened to come across this gem on adult swim and I couldn't believe how interesting it was and I was so hooked and I watched every episode. I feel kinda sad if it's over. I know people say the way it ends on the manga is how they ended it... Idk I just usually never get into many shows. This one was so unique and special and also intelligent which is usually pretty lacking in tv shows. It was just a great story I have to say.