Starting with HSDxD : Dominating Worlds Harem, Fanfic

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 from anime or novel or even the worlds. this is for the practice, as I will be writing a new novel after completing it. so hope you will stay tuned and support me with Power stones and Reviews.
This novel would be a lot of fun so I hope you guys would again read my work.
Thank you.