Fairy, You, the Game... Did I Become Your Magical Artifact?

Thanks for the invite. I'm in the world of immortal heroes, and I've just become someone's bonded magical treasure.

The immortal maiden I'm bound to is devastatingly beautiful, but she's a bit unlucky.

No matter. I'm a human-shaped editor.

[Enhancement +15]? Piece of cake.

[Divine Enchantment]? I can farm that too.

What, the story ended in a bad ending again?

No worries. I can still [delete the save and start over].

By now, I've helped her clear the game for ninety-nine runs.

When she finally realizes

that every “fated encounter” was a dungeon I carefully designed,

and every “brush with death” was a perfect ending I farmed for her,

she holds me tight in her arms, her voice choked with emotion:

“One more time...”