one has to do it

桃源暗鬼 • "Mudano is laughing, quietly. He isn't very happy to teach them, to explain the dirt part of their world and how things- how this nothing-good things happen.
He might not be very happy with all of that but he is happy - or, well, excited, at east - to be able to spend some time with them.
And teach and share with them most of the things he can.

It is really a good gift, even though he is still learning how to behave and interact and even love the gift."

Or: a Mudano-sensei POV where hes locked in his room and it's his birthday and his students want to make him a surprise (they almost really surprised him, actually.)