Start By Summoning A Small Skeleton

Lu Wu opened his eyes and found that the world had changed.
There is no gorgeous magic in the world in front of him, and there is no fighting spirit developed to the extreme.
Yes, it’s just a summoner who contracted to summon monsters.
And he happens to be such a summoner, although he is not a professional, although his initial summoned beast is a bit scum.
But it doesn’t matter because he’s carrying a hang!