Re:Zero - Starting from Zero (Natsuki Subaru)

(The book's rating has just been released and will improve later! Don't worry, it's worth reading!)
[Re:Zero Fanfiction] + [Amnesia 486] + [All Members Watching the Movie] + [True Love Subaru]
Natsuki Subaru wakes up to find himself in a room filled with green plants, a place he's never been before, with a silver-haired beauty and a blonde little girl beside him.
Before Natsuki Subaru could even rejoice at being transported to another world, he faced his first death.
After returning from the dead, Subaru decides to share this ability with his teammates in the Sage's Tower, only to overhear them complaining that he's a burden. Shocked and in despair, the sky descends.
This is a hidden story belonging to Subaru Natsuki.
Then, the screen began playing a recording of everything Subaru Natsuki had experienced.
Everyone suddenly realized just how much this all-knowing young man had sacrificed for them...
From then on, a group of ultimate demon lords were born around Subaru Natsuki.
I read the original work many years ago, so I don't remember some of the details very well. There might be some errors, so please consider them as the author's personal interpretations.
(There will be "if" scenarios, so look forward to seeing everyone's reactions to Subaru's different choices, hehehe)