The Many Mornings of Martin

[Fanfiction + Major Reimagining + Short Story + Invincible Protagonist]

My name is Martin. Every morning when I wake up, I find myself in a very unusual role: a caveman, an astronaut, a president, the richest person in the world, or even an alien...

No matter what I turn into, whenever my friends are in danger, I become a savior and quietly set everything right...

(A new writer's work. I'd be grateful for any advice. The plot has been heavily reworked and combines all sorts of elements, including Cthulhu, popular anime, Marvel movies, wuxia, sports, and more. It's a bit of a mishmash.)