Ultraman Super Universe: I Sit at the Same Table as the Four Mysterious Ultramen

[The synopsis may be a bit weak, so please head straight to the story.]

He transmigrates to the Land of Light and becomes a classmate of Mebius. After watching Mebius embark on a Hell-mode mission, Hope thinks he's finally safe, only to discover that his own responsibilities are even heavier.

He can't change the past or stop the future. Only the present is real. With his singularity constitution, Hope has no choice but to take on the task of maintaining the timeline to ensure his own safety.