I feel guilty when I'm reading visual novels other than danganronpa. It's like I'm cheating on it.
Is there a reason that you're so obsessed with that one book?
I've exhausted most of the danganronpa series already.
You don't have to enjoy every visual novel you read. You can be a fan of one series at a time.
But it's just one book and I've read it already.
If you don't feel like reading it again and again, then you should expand your horizons and look into other books to read. There is no reason to feel guilty about moving on to a new series after finishing one.