異世界魔王と召喚少女の奴隷魔術•Isekai Maou to Shoukan Shoujo no Dorei Majutsu

How NOT to Summon a Demon Lord

An elite but socially-stunted gamer finds himself in another world, inhabiting the body of his character Diablo. Despite his powers, his awkwardness keeps getting in the way, so he decides to pretend to be a Demon Lord and soon finds himself with a pair of slaves: a well-endowed elf and a cat girl. Together, they struggle with everything from interpersonal relationships to diabolical beast battles. (Source: Seven Seas Entertainment)