Journey of the harem king

WARNING before reading: the story has a massive harem like Pokemon! this is the fulfillment of wishes and does not expect character development. I write this for fun Mc becomes Shota Gilgamesh in DxD with the system to become stronger and marry the goddess who reincarnated him. A beta and a massive harem, why not :)))) I have read a lot of series on this site and got some ideas from them.