Remember, You Only Have One Shot

After hacking the mainframe of the entire multiverse, a Player from the Undertale universe finally escaped the doodlesphare- the endless void where every AU is nothing more than a forgotten draft, condemned to repeat itself endlessly.
He made his choice.
He arrived in the Advanced Class AU of Fundamental Paper Education carrying a single, almost impossible mission: create a happy ending. Not just for the protagonists. Not just for those who "deserve" to be saved. He wants to save everyone - even those who, in the original story, were never meant to have a future.
But this world does not follow the same rules as the ones he came from.
There is no RESET.
There is no LOAD.
There is no second chance.
The moment he entered this timeline, the power that once allowed him to try again was completely taken away. Now he has only one life. One single shot to change everything.
Thrown back to the very beginning of Advanced Class, the Player must navigate a dangerous and twisted version of the school while trying to understand its true nature. To succeed, he needs to get close to the two most important figures in this world: Daniel F. Barrel, the protagonist destined to shape the fate of Advanced Class, and Lord HanseΓ, its greatest antagonist.
Every decision matters. Every mistake is permanent. Every death is final.
As he walks through the halls of a place where failure means erasure, the Player begins to realize that creating a happy ending may cost more than he ever expected - not just his life, but his very sense of what "happy" even means in a world built on tragedy.
Because this time, there are no do-overs.
This time, the game is real.
And he only has one shot.

Warning: This story may contain 18+ content, swearing, and other questionable decisions made by the author... but only in a galaxy far, far away. Read at your own risk.