This is basically a challenge to all good HSDXD fanfic writers out there that are sick and tired of the lame "Generic Shonen MC replaces Issei" or "OC replaces Issei" fics and the fics that have potential, but get hijacked and stop being written ( like my Ends and Beginnings, which may get a revival.)
Plot:
After the anime and the events of the LNs that focus on Belilal, Issei loses control of his magic and unconsciously creates a "Night of the Black Sun" which pulls in everyone in the area with weaker, little or zero magic into the black hole created by his magic) which causes a third world war ( COD:MW3). This is noticed by Rias, who kidnaps him from his cousin's house after noticing he has a grimore tied to his arm. He is forced to attend Royal Bibila Academy, a Hogwarts of sorts for newly awakened mages, "Maou King Candidates" like himself with uncontrollable power and members of the other supernatural races. After an embarrassing incident with her that leads to her using one of her family swords to nearly kill him, the headmaster (Azazel) reveals that Rias and five other girls Issei encountered through the series (Asia, Irina, Sona, Akeno,Koneko) are part of the "Trinity Seven", a group of female magic users chosen to keep the balance between "fantasy" and the real world, and secretly to aid the "Maou King Candidates", which are revealed to be "The boss of all the bad guys" . The seventh Trinity Seven member is Levi Kazama, a perverted young woman who is a self-proclaimed ninja.
After meeting the Trinity Seven Issei finds himself in a series of misadventures, conspiracies on both sides and an ancient organization known as the "Order of the Star" that is arming both sides of the world war to consolidate its immense power and rule over the worlds through a "united Earth government".
Rules:
. Issei keeps his canon harem but you can add Raynare, Kalwarner and Millet. Levi is not an OC.
. The plot of Modern Warfare is very important to the story.
.You can use techniques from shonen anime and other harem anime, but absolutely no other characters unless necessary.
. Rias does not use guns at first, but when she does they are powered by her Destructive Power.
.Asia and Irina are sisters and Asia uses a camera that can detect magic and people hidden by cloaking technology. Irina on the other hand uses her magic to move at accelerated speeds.
. Headshots can take down Low to Medium-Class mages.
.Akeno can channel her magic to her limbs to move faster, while Sona uses a crystal ball to deflect magic and has blond-black hair.