It's Not Easy to Live in a Different World.

A young man with smooth sailing and a bright future accidentally traveled to a different world and became the third son of a baron. He began to struggle to survive in the different world. With constant efforts, he becomes resolute, cold-blooded and cruel. Gained some, lost more. The structure of the other world is roughly the same as that of the earth, but there is no distinction between eastern and western civilizations. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.