I can't put into words how great this VN is.
It truly is a fan disc. It's like a dessert you get after eating a very delicious main course (fate/stay night) but the dessert is a 20-layer wedding cake.
Every character and their relationships with others are expanded upon, more lore & mysteries have been added to the world, a ton of great comedic and comfortable scenes are present and so much more.
I also want to applaud to its soundtrack which is one of the best I have ever heard.
This VN is a true marvel and as good as F/SN if not even better