The series itself suffered from some of the pitfalls that catch BL fans, such as source material that isn't very nuanced when it comes to MLM relationships, and budget probably could've been spent more judiciously. That said, this did return to the couples after they'd been established long enough to mean the commitment is real, but not so mature as to have real strategies for dealing with conflict.

If you enjoyed the series, this is a must watch.

I'll put a couple of further notes in a spoiler marked reply below.