"After transmigrating for long enough, you can always sum up a few lessons about life. Do you get it?
First, don't get involved with the protagonist.
Second, if you absolutely have to get involved, let someone else do it.
Third, if there's no one suitable, raise someone yourself."
This is the story of someone who takes in disciples everywhere and, since he completely fails to follow the first two rules, trains those disciples into phoenixes of unparalleled arrogance.
"Oh, right. There's one more rule.
Fourth, if you can help it, don't ever, ever let them get any strange ideas."
As he dodged his disciples' "attempts to hunt him down," Meili said this.
Demon Slayer (completed) -> Tsugumomo (setup phase complete) -> KonoSuba: God's Blessing on This Wonderful World! (starting soon) -> ??? (undecided)