What Should I Do as the Villainous Hero’s Senior Sister?

[Female Lead Focused on Cultivation and Finding Her Way Back to the Modern World + Villainous Male Lead Who Cultivates Both Immortal and Demonic Arts + Original Green Tea Female Lead]

By a twist of fate, Qing Yan transmigrates into a book and becomes a minor supporting character named Qing Shijin. Arranged by her father, Qing Cai, she joins the Qinglan Sect and becomes the disciple of the greatest swordsman. To her surprise, the male lead, Sikong Zhenchen, who will one day become the Demon King, becomes her junior fellow disciple. Qing Shijin hopes they can simply get along peacefully, but as they spend time together, she comes to genuinely regard the villainous male lead as family. To keep him from following the path laid out in the original story, she has no choice but to bring him and the heroine, Chu Yaoyao, together. Who could have guessed he would tell her, “You’re the one I like”? But I only seem to have the kind of feelings for him that I’d have for family...