The Eldest Sister of the Sect Was Abducted by Her Sickly Junior Brother

Please Write About Cultivating Immortality from the Cold Female Senior Sister and the Yandere Junior Brother (Don't Wear It Quickly❗️❗

I want to see a cold female lead, cool ❗️Cold❗️Don't wear it quickly❗️Who knows, it's so hard to find this kind of thing. I want to see a cold female senior sister or a female master and a yandere disciple, but when I search, all the characters show are quick wear, and the heroine's character is not cold at all. Wow, it's so annoying.