Ten years of fighting.

Ten years of watching friends die one by one.

When Seo Ha-yoon finally reaches the top of the Obsidian Tower, there is nobody left to celebrate with.

So he uses his reward to go back.

Back to the beginning. Back before the summons. Back before all the regrets.

The plan was simple: save everyone this time.

The part where he wakes up as a girl wasn't.

Even stranger, the world insists that nothing has changed. To everyone else, Seo Ha-yoon has always been a girl. Including Kang I-jun, the childhood friend who stood beside her through every stage of life.

With the Tower's return drawing closer, Ha-yoon prepares for another climb armed with ten years of experience.

The monsters are familiar.

The future is familiar.

The way I-jun looks at her is not.