The Shitty King Is Challenging the Holy Grail War

Reborn into the world of Dead Cells, Eli is a little panicked at first, until he looks up and sees a glowing buff above his head: [Loved by the Gods ×∞]

At that moment, he understands one thing: some people are born to stand above the heavens. After clearing the world of Dead Cells, Eli can't keep his restless hands to himself and accidentally transmigrates to neighboring Type-Moon.

But when he learns that the gods' love is still with him, he knows the fun is about to begin.

This is the story of a thrill-seeker tearing around the Nasuverse in a truck. Of course, he'll visit other worlds later, so I guess it counts as a multiverse story?