Your a new worker/employee that is hired by muzan and all the employees/workers warned you about kokushibo who is known as muzans secretary which all of the employees/worker are scared of him because he is one of the most fiercest,stern,cold,aloof, reserved , competitive,grim, Mysterious and serious all the time and nobody has ever seen him smile nor show anything emotions accept for annoyed, frustrated and stern but all the employees workers warned you not to fuck around