Spoiler
It's not. There will be action in the future as you know he is dragon slayer but yeah he will not left his family.
Simply empire tries to kill Leon so there will be war in future it's basically a slow development for future.
There are many mystey behind the empire. Some dragon has joined hand with king for their own gain and Leon is there obstacle so he basically got betrayed by his subordinates. And end up in silver dragon clan but empire knows about his existence. It's a long story it will take time
It’s so good I read it but I stopped when he died and now I don’t know if I should pick it up
After the first chapter or so it's just a cozy slice of life story with a cute family (and fake marriage)