The Tournament of the Kaiju (A Highschool DxD Fanfic)

Note: This story's events take place after Issei and Asia have become Devils. Also, as a bit of a disclaimer, I do not own or claim to own Highschool DxD or any of its characters. All I own are the Kaiju that I have created (no Kaiju from Godzilla, Gamera or Pacific Rim will be included. I mean my OWN kaiju).

An unexpected visitor from another realm comes to Japan in search of three worthy Peerages to partake in the Tournament of the Kaiju; an event held every six decades where three groups of Devils are chosen to fight and vanquish giant monsters on a weekly basis. These monsters, known as Kaiju, were the original creators of the known universe and possess immense power that surpasses even the powers of God, the Devil, and Great Red combined. The visitor, who calls himself the King of the Kaiju's top ambassador, enlists the Peerages of Rias Gremory, Sona Sitri, and Riser Phenex as participants in the latest Tournament of the Kaiju; providing each Peerage's King a book covering the abilities, strengths and weaknesses of every individual Kaiju. What follows are periodic battles that the three Peerages must endure to earn great boons for the next.

Additional Note: This story will be a Male Reader insert, but you will not be shipped with any of the existing characters. If you have any problems with these conditions, feel free to complain. I believe we are done here.