The issue is that, in most VNs, new characters have their stories start at the point of initial introduction, their participation isn't thrown back to the beginning of the VN such that you have to abandon everything you've done up to that point and completely restart for things to work. This was basically a "re-write" of the VN, inserting a new character that didn't exist before, and forcing a restart. When you have a VN that's on the "mature" side (in this case, initial release plus 9 updates), that's a bit annoying. Granted, this VN doesn't have quite as much going on as some, but it's still a little bit of an annoyance. It's almost the same as when an established VN changes their RenPy version halfway in, when there's already about 20 or 30 hours of content, and borks all of your old saves. This VN probably only has about 10 to 15 hours of content, but that's still a big replay commitment. And, if I recall correctly, it's the third time remedial content has been added forcing such a replay to get the "new" content in the "old" part of the VN.