kuoh's project shadow (high school dxd harem x OP male shadow the hedgehog oc)

50 years ago, a scientist named Gerald Robotnik made his ultimate creation: project shadow or shadow the hedgehog as he called it. But suddenly, the military infiltrated the space colony ARK and killed everyone involved with the project, including professor Gerald's granddaughter Maria Robotnik and has taken project shadow as their secret weapon. 50 years later, after losing the rating game against Riser Phenex, Rias Gremory stumbled upon an abandoned lab with project shadow still in the tube until she accidentally awakens the man made creature. now shadow or Toad as he prefers to be called, devoted his life to Rias as thanks for releasing him. Because of this, Rias as well as every other girl has fallen in love with him.