How NOT to Summon a Demon Lord Vol. 1,2,3 Manga 
SEVEN SEAS ENTERTAINMENT LLC
(W) Yukiya Murasaki (A/CA) Naoto Fukuda
Fake it 'til you make it in this all-new fantasy harem series! An elite, but socially-stunted gamer finds himself in another world, inhabiting the body of his character Diablo! But 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!