Summoning. One of the rarest type of magician exist in the world. Who would able to underestimate summoning and ordering a mighty pheonix, or summoning an invincible dragon? Of course, none. To master the path of summoning, only those born with an innate talent and strive to learn the path of summoning magic might be capable of achieving and master the powerful magic. But not for Lyan Arcanium Evocatore. After succeeding defeating his lifetime quest of saving the human world by offering his life, the great incubus's wish of living freely got granted and he wakes up at a parallel world with 8 powerful spirits contracted with him. The only problem is... -You are? -Whoa... What with this weakling? -It seems that you're my master, nice to meet you -So you're the forementioned servant, huh!? -B-Big bro! Y-You're the summoner! -........ -Boy, you look delicious -Um... Where exactly are we? "How should I know!? And why the hell should I sleep with women in order to get my summonable monsters!?!?" Follow the summoner Lyan as he become a mercenary, become a lord, become an adventurer, and sleep with women to increase the number of his summonable monsters and become the strongest!

The world are being consumed by the flame of wars. Kingdoms and empires fought for supremacy. But for a small kingdom like the Ravdryn kingdom, even if it didn't participate in the war, the flame of the war still reaches it and spread destruction towards it. Masc Erickson. A former noble son of the Ravdryn kingdom that flee from the Ravdryn kingdom from the terror of his father. His father killed his mother, his little sister, and his little brother in front of his eyes. With his loyal butler's life as the cost, Masc able to flee towards the Armenia empire and successfully lives as a merchant and a secret imperial order of the Armenia empire. One day, he's relieved from his duty and is allowed to go back to his homeland and for him to take revenge. And a fateful meeting with a certain noble girl of the Ravdryn kingdom changed his course of life.