this series either you love it or hate it, hence explained the low rating, especially you need to use your brain for BL drama, which is big no no for most and sad and a lot of crying also big no for most, and older soon is not handsome and too old also big no for most...i predict the rating will drop to 7.0 by end of the series...
https://en.wikipedia.org/wiki/6_October_1976_massacre
Nai->Dan
Dan<->Cha aim
Josh->Cha aim
didnt see the depression phase yet so maybe not bipolar