What If the Strongest Final Boss of The Original Story Became The Protagonist's Companion?

Reincarnated as the strongest final boss!?I just want to enjoy an overpowered, lovey-dovey life in exile!!“Where… am I?”I was an ordinary salaryman and hardcore anime/manga otaku, but one day I woke up in an unfamiliar room. On top of that, even my sloppy physique had completely changed. Thinking it was a dream, I pinched my cheek—but it hurt normally…So when I checked my reflection in a nearby mirror—“N-no way… I’ve become Yugram!?”The person staring back at me was Yugram, the strongest final boss from the hugely popular fantasy novel Holy Hero Iris!But that character is destined to commit countless atrocities before eventually being defeated by the protagonist, Iris.In order to avoid this doomed future, I decide to defect to the kingdom where Iris lives and pursue a peaceful slow life instead. However, perhaps because my actions differ from the original story, I keep getting dragged into one trouble after another—!?