Very likely it's a new power he achieved while training for hundreds of years. I mean, he already is able to use the techniques of all their disciples. So storing the feeling of the people he fought, doesn't sound that out of place.
There are 2 things that I like.
1) That annoying one-shot concubine was never hear again.
2) and every characters are getting their own life and stuff going on instead of being brainless harem members.
Even though dudes love Luck, they didn't want their daughters or some random furry to become their old friend's wife/lover, so King Bro sent the marquis' daughter instead as an "assistant". Like,no matter how much you appreciate your bro or how young he may look, you wouldn't want a guy close...
The landlady knows, her friends know, their entire classroom know too. They'll have kids and still be in denial.
@RealSaMu people think they're at an airport, so they MUST announce their departure
Maybe I'm wrong, but does it have a meaning that thing about Sachi suddenly having eyes now? I think it's a bit weird that everyone, except the ones who we already know, doesn't have eyes