I found this to be a unique take on the Isekai genre, entering another world while leaving a window for the people in the old world to interact and observe the events of the new one. A great story overal with fun gags and an interesting direction, unfortunately held back by an (imo) incredibly disappointing final episode. I can't tell whether the ending was like this to leave it open for a second season, or if this was actually how the story ends, but I didn't like it, but as a whole I think you'll find some enjoyment from this anime.