I Possessed Isshin

Rias: "See? I was pretty lucky back then, wasn't I?"

Akeno: "He likes me more, you know."

Asia: "Dear Lord, I hope I can stay with Issei forever."

Koneko: "Issei, come rub my head."

After transmigrating and taking over Issei's body, he has a System at his disposal. How will he use the powers of myriad worlds to trounce the Beast Kings, win over the Great Red, and build a super-dimensional harem across the multiverse?

Beast King: "I've never met anyone truly powerful before."

Great Red: "Do you intend to conquer me and make me your Dragon Knight?"

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.