Just watched episode 4.
This is a serious, thought-provoking drama, no doubt. But it managed to be unexpectedly light-hearted as well at some of the most serious moments. ... It didn't take itself too seriously.
The real star really seems to be Yamazaki Tsutomu, who played the Professor. He was great again. I wish I could see more of Sakai Maki and her character, so far she is only a minor character in terms of screentime.
Much of the dialogue were very meaningful. Some of it remind/explain things I could relate to, but haven't quite come to grip with. The contrasting sides of human nature were shown most succinctly in a single episode yet again... I think I am beginning to appreciate why this is regarded Nojima Shinji's best work by his fans.