This is hard to review because I can see both what they were trying to do, and where they got lost along the way. Jade could be a bit of a buffoon who finds himself suddenly the leading man, but they went too broad and he's frequently clownish rather than a lovable fool. In the second half of the series you actually do get glimpses of what could have been - scenes where Jade is interacting with his family in particular. He's a lonely man who accepted his role as comic relief or a NPC in other people's stories. His struggle to start acknowledging he has needs and wants could be so much more. Yim did actually hit that emotional note several times, but quite late in the series.

I did like seeing King and Uea as an established couple. Uea seems like he finally feels safe with King. That makes me happy.

I'd recommend Zettai BL ni Naru Sekai VS Zettai BL ni Naritakunai Otoko instead if you want to see a NPC get a story of his own.