Reborn, My Junior Sister and I Swapped Our Lifebound Swords

In the Sword Cavern, I passed over the dazzlingly radiant Bifang and chose a long sword that had already rusted.

My master stopped me, saying Bifang should be my destined sword.

But when I saw Bifang circling around my junior sister, I shook my head.

In my previous life, when the demons invaded, they learned that my junior sister was his weakness and used her life to threaten him.