Ninkai Trading Co., Ltd., guided by its motto, "Enriching lives from the shadows," operates across a wide range of industries rooted in everyday life. Known as one of modern Japan's most popular and versatile trading companies, it enjoys widespread acclaim. Among its employees is Shozo Hattori, whose ordinary sales performance leaves something to be desired, but... he demonstrates unparalleled expertise in "ninja duties"! This is the story of seemingly ordinary salarymen navigating their not-so-ordinary daily lives in a modern setting where something is just a little off.