I don't get all the hate this arc got (but I will assume there are valid reasons for such, so I won't pry), but I liked it all the way through.
I love Kuromu's character a lot. what with her overwhelming passion and confidence in her entire craft and this arc really demonstrates that. even if it does sorta take away the spotlight from Iruma for a bit
EDIT:
Is there some context to the sudden manhwa hate I'm not getting?