User blog comment:B214/High School DxD EX/@comment-4547267-20150828141639

This mean sound bad...but i think i know the reason Issei is working too hard, maybe...during the war, he lost many important people in his life, maybe even Rias! I kow it's hard to believe, but the kids hadn't mentio her or what happen to her! 0r, possible, Issei realize that he can no longer live a peacful and erog lifestyle if he is him, so he decided to be a hero to finish all of the duties in order to live a peacful life