Author basically just said "I wanted to make another manga but they rejected it so fuck sazi chan" /hj
But seriously, even from the concept it's like the author had it out for Sazi, never actually wanting her to be happy with Hikari even though that'd be the perfect ending to the story.
Honestly it was going downhill since Mero was given the spotlight, Sazi barely appeared in her own manga, and had maybe two whole chapters actually interacting with Hikari. We barely learned anything about her and the others because of how heavily the author laid into their jokes, then rushed the ending without any development whatsoever. Honestly, I was loving this in the first volume, but now? 1 star is too high for this trash.