I stand by my opinion コンビニ人間 is easier, but there isn’t a consensus on this. For example, on learnnatively.com Kiki got 26 in hardness and Konbini got 29.
There is a かがみの孤城 book club starting soon and while I only read through 7% of the first volume, it seemed very approachable, easier than both Kiki and Konbini.
It’s got 28 on Natively, through But since it’s before book club run, there also aren’t too many ratings for that one.
But since it’s before book club run, there also aren’t too many ratings for that one.