I'm searching a manga (I read it around 5-6 years ago) that, I think, is based on Dragon Quest's Universe, some people tells me that then and it make sense.
The story start with a kind of neet who had, for only skill, to fire the village's campfire.
The "hero" is a really douchbag and don't care about nothing other than his campfire.
For some reasons, that I don't remember, he start to travel with an old monster trainer and become one too, he start training a slime and i don't remember that much.
The following picture is from another manga called Monster x Monster.
The drawing style is similar, by the way, the old monster trainer, the mentor of the hero look the same of this old man.
EDIT: The name of the author is TOBITA Nikiichi, he publish this manga in 2011 and create it from a amator novel parodying DQ V.
I'm still searching the name of this manga if someone remember...
Thank you for answers.