Issei new adventure in a powerful world

This after light novel volume 25 and a bit further into the future.

Issei after everything he has achieved and made his dream of becoming a harem king come true, he is now sitting on a chair in his house like mansion that he and his wives are living in relaxing, but his relaxing moment got ruined by a magic call for his sensei Azazel that tells him that he has made an mistake, this makes Issei confuse before he could say something back a light magic circle appears around him and makes him disappear.

Issei will now face powerful threats and find his way to go back to his world.