Also known as: What Should I Do About My Little Sister Becoming a Yandere?
[One-on-one pure love] [Eris, naive at first and scheming later, x Cassandra, gentle and clueless, who will always love Eris]
"Sister, is our very existence... a curse?"
In the filthiest corner of the Kingdom of Hui'an, two sisters depend on each other for survival.
Eris is a "bringer of plague" who brings disaster to anyone she touches.
Cassandra is a "harbinger of misfortune" who can foresee calamities but cannot change them.
Until...
Princess Eleanor of the Kingdom of Hui'an discovered them and brought them to the academy at the heart of the continent.
Cassandra had always doted on her little sister.
But as time went by, she realized that her sister's gaze was growing increasingly strange...
As the two met more and more witches, Eris realized that the world she'd shared with her sister alone had been disrupted.
Even the Dragon King, once the strongest of the dragon race, came to interfere with the two of them.
Most importantly, the Dragon King even abducted Eris.
Only after losing her did Cassandra gradually understand...
Headmaster Archimideros gently ran his finger over the crystal ball and chuckled. "What a perfect sacrifice..."
An ancient prophecy comes to pass: the blood of seven witches will become the key to saving the world.
But who says that someone who is cursed has to willingly go to their death?
As the altar's flames engulfed Eris, Cassandra finally kissed her bloodstained lips.
"I give up. I love you."
The "corpse" in her arms suddenly opened its eyes.
"Sister, that illusion spell you taught me..." Eris took the initiative and said, "It worked."
