Astolfo will be my wife

I'll keep it simple. A normal man fell in love with two things. Strength and astolfo. Not a day went by where he didn't train from martial arts to yoga all just to be a little bit stronger. His love for astolfo started sense young the second he saw him he was infactuated. Every time he was on screen his love depend untill even his dreams Where filled with him. However sadly both of these could only ever be dreams even strength wise by the time he was 90 the best his body could manage was a steel. Bullet did nothing to him but this meant little what about bombs or even... nukes his time was up and these where the results. At 185 years old he died the oldest man ever skinny normal and sad. Lucky for Alex the multiverse had other plans. (Ok you get the idea Op mc transmigrated to fate world. I have planned a storyline I'll say just this much the fate world will not be all the story is. As a fan fic I have privileges so... With astolfos world as a start I will expand the story into the universe" I have many other works going on. So this synopsis is bare bones as well as the story.