While being abused by his father, she recalled memories of her previous life and realized she was in the fantasy novel world she saw previously. There she was born as a side character who dies before the novel even begins.

Ariadne thought calmly.
‘Screwed. It was also screwed on a global scale.’

That novel had a very bad ending where the protagonist failed in saving the world–that is, destroyed.

‘If the protagonist regresses, the bad ending is confirmed, and so is this novel!’

To change the ending, she must save the world, save the protagonist, and save their companions. However, the first person she should save…

“Take me, Grandpa!”

She was destined to die at the age of 16 after being abused. Now her destiny will be to save the feature romance fantasy <protagonist>.