I’m Izumi Nobusada. 35 year old, just a humble clerk of a convenience store. When I was enjoying my consecutive holidays that I hadn’t had for a long time, it was just my luck that I seemingly got summoned to another world. Furthermore, a former demon lord interfered in this summoning. The former demon lord told me, 『Please listen to my two requests if you become strong. You can live freely besides that.』 Usually here, I should have been the one who got my wish fulfilled shouldn’t it? Well whatever. The former demon lord made my body younger as a farewell gift. I’m gonna say goodbye to my introvert past self and do my best. Aim to become! Mofumofu King!?