One of the best BL I have seen, it doesn't revolve around the romantic aspect but it is there and offgun chemistry is off the charts. I really like the acting of everyone in the drama.
And the series is so much better than the book I'm so glad they changed everything even if they didn't give us GramBlack.
First and Gawins couple was also pretty good.
Is a most watch that I recommend even to people that don't usually watch bl series.
The ost song is one of my favorites, and OffGun song (My Side) is also really good.

I really do reccomend it, I have watch it like 5 times already.
And I'm waiting for another OffGun series.