Transmigrated as the Villainess, I Got a Happy Ending with the Second Male Lead

This book gave me the feeling of a strange world with some strange rules. The protagonist enters a book and becomes a vicious second heroine. Everyone is advancing the plot according to the character. The male protagonist tolerates the heroine unconditionally. The heroine is as kind and beautiful as a little white flower. The father always firmly believes in the heroine and hates the vicious second heroine. As the support of the heroine, the mother always makes suggestions. The second hero obeys the heroine. But the appearance of the protagonist also changed the original story line. The second female lead survived, and the second male lead seemed to like the second female lead, but he was still aloof, as if everything was changing in a way that was good for the second female lead. But at this time, the villain took action, and this time the second female lead became the vicious female counterpart again. Next, a princess appears, and the plot seems to want to trample the second female lead into the mud. The emperor and queen are all part of advancing the plot until the protagonist decides to die. At this time, things seem to have changed again. The heroine seems to have become a vicious supporting actress, the second heroine is transforming into the heroine, and the protagonist seems to be trapped in this world.