Re-reading it all there was a chapter in which miss landlady said that she didn't need to know her name since they are neither friends nor lovers but only in a contract. Which means?!?!?!?!
I don't remember when exactly the colored panels were introduced but I really do love them, the one in the new chapter is no exception. We've been seeing a lot of Yumimi and Nononon lately which has made me really fall in love with them, hope it works out in the end.
This one seems to be done by the artist themselves, a few were not by the artist but almost all are made by this artist.