While the manga is pretty good, the light novel gets across the absurdity even better. For example, its not that there was no seat for Micheal among the guests, but after meeting the Demon King and Heavenly Kings as well as the various dragons, he hastily declined to be seated with them and asked for a seat further away. This was his first time meeting them. For the VC, the demon king and dragon king are just "in-laws" and friendly old men... to everyone else they are terrifying to the point of forfeiting their lives when met.