dk why but my random thought was, imagine the kiss part but with end series rentaro, it'd be like 2-3 chapters long.
also i like the choice of having all the holy stones be different in appearance depending on the skill. weirdly nice of her to give them back those if her goals killing all or most humans but perhaps it was more of an investment in the chance of him/them, joining her side, which.... if his ladies wanted to he probably would haha. shame this isnt actually a revenge manga they'd join up with her and things would get crazy xD