Starting with HSDxD : Dominating Worlds

An otaku assassin gets killed and was reincarnated in the world of DxD with a gold finger.So what will he do when gets a chance to travel the different world and complete all his dream.Its a world Traveling novel with lots of twists and turns. This is my second attempt at making novel and this time I have done a lot of research, so the errors would be at a minimum.I don't own any original character...