For the record I don't think this is where the series is going to go, but I do have some questions about "how" MCs ability works.
How would it interact with cross dressers, Ie astolfo, or self-identified males? Would they still look like rocks because first glance he thinks they're girls? Would they turn into humans on reveal?
Follow up, would this mean if he got used to say, the female friend, would she gradually turn human in his eyes?
Unrelated,
While played for laughs, MC has an imaginary friend in high school he treats as real... I'm very curious how the author plans his character arc.