Brocon no Ane ni Jitsu wa Saikyou Mahou Shida to Bareta. Mou Gakuen de Jitsuryoku wo Kakusenai (Associated Names)

I have a sister who is a brocon. She loves me so much that she would do anything for me. She even became the strongest magician in the world to protect me. But one day, she accidentally revealed her true identity to me. She is actually the reincarnation of the legendary witch, Lilith. Now, I…