What to Do After Dressing up as a Yandere Heroine

After reading a yandere novel, what should I do if I feel that the heroine doesn't know how to flatter me? The system actually asked me to be the female lead because I felt sorry for the male lead (who was poor and dreamy). How can you trouble other little cuties with such drudgery? You can't regret the system, so hurry up! To avoid long nights and many dreams.