Ok. I have just finished reading this VN. Let's share my thoughts.
The vn is full of references to Irish culture and Gaelic mythology, which shows in a wide range of forms, from slang words to the characters' names. The idea of turning the concept of expansion into expansion of horizons to a new world was a creative way to use the theme and introduce pseudo-isekai in the vn. Sometimes it feels like a parody of epic fantasy media, yet the vn has its sort of serious moments too.
A traditional epic fantasy piece of media with a touch of genre-conscious satire.
Thank you for the experience!