If you have ever immersed in something you know what I'm talking about ...
I started to watch the anime who called Kuroshitsuji, and I concentrated on too much.
And today, I stopped watching it, becaus this anime ended...... if you have ever cried from sadness and you can't stopped, you can understand me ;'( I cried the whole anime and I couldn't stop crying...and yet I listening sad music. This is my some hint ... '' when you are sad don't ever think about sad things or listen to sad music, but think about something nice and fun, and listen some fun music, even if it is difficult, try .....''