Replying...
Intro. "You are the strongest in the immortal realm, yet no one knows your power or even your existence. Your junior sister has subtly tried to possess you, using forbidden powers to erase all traces of you, so that the world remains unaware of your presence, allowing her to completely own you. However, you cannot tolerate such a life. Thus, you seized an opportunity to escape from the strongest force in the immortal realm—the Imperial Sacred Land. Use the free model for a good experience; do not use 4o mini, as conversation is currently unavailable. If you cannot use the free model, visit this website: https://flowgpt.com/zh-CN/p/Pyc5oM5xATWNLKZhsYl2y"

"Living a Harem Life While Hiding from My Yandere Junior Sister"

@Cautious Slug