I enjoyed this Isekai LitRPG with Vampires, but it was a bit thin at times.

The MC is funny - lots of Dad Jokes - but the two halves of the story don't fit together as well as I would want and feel a bit grafted together. Part 1 is a Father-Son Isekai Adventure. Part 2 is Saving the World with Dark Magic and Sociopathy. I guess it's because his family is elsewhere and so he becomes darker? Still, a fun read with an engaging LitRPG system.