I just live with the fact that I am not needed by my family, company, or society, I am like a living corpse. I am just a middle-aged man without any charm.

The only thing I look forward to is the neat, dark-haired schoolgirl I see on the train. Of course, I can't talk to her. And they she looks at me. I was happy just to see her every day.

One day, however, I met the complete opposite of the dark-haired angel...

[From official site]