The Unrivaled Sword Saint Salaryman ~My Childhood Friend Occasionally Asks Me to Help Save Humanity~NewKensei Salaryman Musou ~Osananajimi ga Tokidoki Jinrui wo Sukuu Tetsudai wo Tanonde Kuru~; 剣聖サラリーマン無双～幼馴染みがときどき人類を救う手伝いを頼んでくる～; Kensei Salaryman Musou ~Osananajimi ga Tokidoki Jinrui o Sukuu Tetsudai o Tanonde Kuru~; The Peerless Sword Saint Salaryman ~My Childhood Friend Sometimes Asks for Help to Save Humanity~

In Japan, "Samurai" maintain order by using their supernatural powers to slay mythical beasts that bring disaster to humanity. Shinnosuke, an ordinary salaryman, one day witnesses a "mythical beast disaster" right before his eyes, but to save his sister Himari, he unleashes his hidden, unparalleled swordsmanship and slays the beast! Surrounded by beautiful girls such as his childhood friend Satsuki, who has already become a "Samurai," and Shizuna, Himari's classmate and the daughter of his boss, he carries out his duties and missions!