He did have a reason for leaving he is being watched and he knows the kingdom are after him. He doesn't want to expose them to that danger especially with the stalking presence he's worried about them getting caught up in it. He mentioned at least till he gets stronger and as he's going to a...
I'm up to current translated chapter and nope. There is some serious story stuff then anything before some very enjoyable long form arcs introduce new characters. Where the novel is currently at is the strongest it's been in my view