Both the WN and LN have only 2 volumes, last release was about a year and an half ago. I haven't read them myself, but apparently both ended rather unsatisfying in the middle of the story. The manga is now about half way through the original story line, so... Don't expect much?
Remember when people used to joke about the main couple ending up having kids before they actually confess their love for each other? In this manga, that actually happened.