The Middle-Aged Delivery Man Who for Some Reason Ends up Working as an Invincible Swordsman on the Side: Will I, Who Has Led a Boring Life, Become the Trump Card to Defeat the Demon King?,The Middle-Aged Deliveryman Becomes an Invincible Swordsman as a Side Job,The Middle-Aged Deliveryman Becomes an Invincible Swordsman as a Side Job ~ After Leading a Lousy Life, I'm Now the Trump Card to Defeat the Demon King?,Unsouya no Ossan ga Nazeka Fukugyou de Zettai Muteki Kenshi wo Tsutomeru Kotoni,Unsōya no Ossan ga Nazeka Fukugyō de Zettai Muteki Kenshi wo Tsutomeru Koto ni ~Saenai Jinsei wo Okutteta Ore ga Maō Tōbatsu no Kirifuda ni?~,運送屋のおっさんがなぜか副業で絶対無敵剣士を務めることに～さえない人生を送ってた俺が魔王討伐の切り札に？～