Clearing dungeons. Rising to fame. And sleeping with alluring women.In a world of swords and magic, the ambitious battle mage Rowan Freyman travels as an adventurer-for-hire to hone his skills. Little did he know that his life would take a drastic turn amidst the forgotten valleys of Zintalia.There, he stumbles upon an ancient grimoire that grants him the power to summon some of the greatest primordial devils to fight alongside him.But with so much power in his hands, not only does Rowan have to adapt to their strength, he also finds himself entangled in a web of intrigue, hectic battles, and a growing harem of cute girls as he delves deeper into the neverending rabbit hole.