Spoilers:
Theme: Expanded worldview.... I guess, but he already seemed to be pretty aware of what was going on, on the other side (from having already talked to the wolf).
Story: One part "reconcile" with family, one part isekai. I'm a sucker for isekai in that I read too much of them, as mediocre as many of those mangas are... but this was pretty cute. Reminded me of Gate.
I think you did pretty well at what you were setting out to do, but your reconciliation scene didn't resonate for me given we didn't have a "before" to compare it to. We needed a prior level to compare the resolution to, imo.
I'm not sure how I feel about the "sequel" bait in the bigger scope ending, but I guess it's on brand. The main issue is perhaps a lot of the time was spent on "yes it is isekai, but here is how it is different" which is cute but pulls away from the narrative you were trying to tell (at least, the short one of family bonds prior to the librarian scope creep).
Presentation: What you did have, I liked, like the really small wolf moving from side to side, and the music you picked felt mostly appropriate, but there was a lot of gaps of music, and a lot of broken images (and I think it woul have been nice to see the pixie too).
Creativity: Psychometry-esque power is always fun, as is isekai subversions, although isekai subversions are still so mainstream at this point that you rounded back to mainstream, but I won't hate too much in that regard.
Overall thoughts: I would enjoy reading more, although that may be because I'm a sucker for isekais, but It was still enjoyable and the character banter was pleasant and did betray a sort of cultural blending of the two worlds.
If the presentation's major gaps were fixed, I think this would be a very enjoyable romp (although I don't know about the sequel bait/continuation ending so much for me).