Okay but genuinely curious, why is it that the MC's friends/family members (both the male and female's) do not just tell them that their feelings are mutual? Even though it's literally in front of them?
My guess is that he lectured her when Wiz told her that Aqua was going to subjugate all the succubus' in that shop while she was fighting Vanir, protecting the said succubus' from her. That or he yelled at her SO hard that she peed out holy water and gave up exorcising them.
Kazuma reinvented SH Figuarts (or figma) and (i think) stop motion, and he just threw that million dollar idea (or however much Good Smiles makes) away
yeah man, give this guy a fucking AI girlfriend (either through an android body like Alice or stayed digital), he deserves it from all the shit he's been through.