Gods Settlement (Kashimo Vessel OC X My Hero )

In another Universe, A distant but similiar galaxy on a green and blue planet. Chaos insues as a blue haired man fights a black haired person with tattoos running along his body with 3rd degree burns and scratches. The blue haired man looks to be gaining the upper hand, until the black haired individual starts to mutate and transform into a literal demon. Concluding the fight swiftly and destroying the blue haired man. But he wakes up in a strange place with a new body ,and conciousness, and no memories near a mansion.(I do not own anything mentioned. My Hero Academia is own by Kōhei Horikoshi and Jujutsu Kaisen is owned by Gege Akutami.)