Reincarnated into an Otome Game as the Heroine's Sister

In her past life before reincarnating, she was a test subject where they fused an ancient, enchanted demon katana with her soul and became the World's top assassin and War machine.
Now given a new start, she is determined to live a life with no regrets.

~Details~
Updates randomly in clusters?? (Meaning, when updated it's at one time with multiple chapters)
Still ongoing

Hope you guys enjoy!!
Any criticism, feedback or advice welcomed and appreciated!