Well, do you have any more ideas?
One idea I had for a Xianxia netorare plot a while back that I never did anything with was, antagonist bad pupil(spoiled young master type?) gets some sort of blackmail material on his (obviously) gorgeous teacher (letter or document or something?). Confronts her, she tries to resist and brush him off. Then, while they're arguing and contemplating how to deal with this, who walks by but the protagonist star disciple, who misunderstands the situation, thinks bad pupil is just trying to get promoted, and suggests that if he beats disciple in some sort of upcoming contest or trial in a month, he gets his way.
Bad Pupil and Teacher agree. Teacher thinks it's a sure thing, and once disciple leaves, bad pupil even swears he'll hand over the thing if he fails, but if he wins she has to be his woman for a year or whatever. She, of course, scoffs, because there's no way he can win and thinks she has this in the bag. Of course, bad pupil never said he wouldn't blackmail her in the meantime, and over the next month forces teacher to dual cultivate with him repeatedly to supercharge him until he can beat star disciple.
Not my most groundbreaking idea ever, but I only started really getting familiar with Xianxia/wuxia recently, so I'm not too familiar with the setting. Use whatever parts of it you want.