Black Summoner, Vol. 1 (Manga) - Doufu Mayoi - Bog

"While being transmigrated to another world, Kelvin bartered away his memories for a collection of powerful new abilities. Setting out on the ultimate adventure as the world's strongest Summoner--with his first Follower being the very goddess who brought him over!--he soon discovers his true nature as a battle junkie. Someone wants to pick a fight? Sure, bring it on! Facing off against one formidable foe after another, Kelvin can hardly contain his delight as he revels in the absolute exhilaration of a good fight!"--Back cover.