Frivolous and ill-thought out; this pair are unethical, and as such don't trigger the same easy moe feeling as the main couple. I'm not excited for any development between these two, nor do I appreciate them taking up time away from the main couple.
I don't want this story to suffer the same fate as his previous one with the vampire and non-siscon, being bloated in meaningless character interactions and sparse in verisimilitudinous explanation for the supernatural.