Mr. Nobu’s Otherworld Chronicles

Mr. Nobu’s Otherworld Chronicles summary:

On a certain day during my long vacation, I think I was summoned.
I came down to this other world, invited by the meddling Devil King using a summoning magic.
In order to keep the promise of protecting the daughter of the Devil King that I will meet three years from now, I will have to earn some small change. Eh? Go big you say? I’m sorry, but I’m just a lowly peasant, so I’m going to go slowly and start with the small stuff first.
If I steadily go, I will be able to grow and enter “I’m OP!!!” mode before anyone will ever notice. How far can my magic power grow!?
The adventure of n.o.busada will begin right now!