"There is some surprising complexity in this isekai." That was the line my wife blurted after she asked me was it good. It's honestly a fun romp I would recommend to anyone as being both silly and wholesome. It maintains a unique flavour while "conforming" to several tropes.
It has some surprising nuance in places for all the silliness of the premise and tropes of the genre.
I would strongly recommend this book to genre fans, but I would also say there is something special here.
It really was the perfect birthday book.