Detective Conan: Cultivation System

A college student brought a USB flash drive and traveled to the world of the legendary dead first grader, Detective Conan. He was surprised to discover: That USB flash drive turned out to be an advanced immortal cultivation system, foundation building? Consecration? Fusion? Golden elixir? Is it difficult? I only know how to farm monsters and do tasks while solving crimes and slaying ghosts in this world where there are so many highly intelligent criminals. Be a big boss quietly and observe everything with the attitude of a winner in life. This story and characters are purely fictitious. Any similarity is purely coincidental and should not be imitated. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.