Original story was written by Murakami Ryu. I didn't know he writes this type of story, as my image of him comes from his "debut" novel, Almost Transparent Blue, and Coin Locker Babay.
I loved the 4th and the 5th episodes. Fine acting by Kobayashi Kaoru (ep.4), Issey Ogata (ep.5) and Hino Shouhei (ep.5). Kobayashi plays a lonely man who is about to find a new job, his mission in life. Issey O. and Hino play childhood friends who happened to meet again after 40 years or so. Their lives are now very different, but they are still connected.