Hi guys I'm looking for a novel where the mc is transmigrated into a novel. The character he transmigrates into is horrible to the ml. The mc cannot ooc so he continues being horrible to the ml but he disguises himself to also help the ml. So he abuses the ml because he has to otherwise he will die or something, then he disguises himself to help the ml. The ml later figures out that the mc who abuses him is also the same person who helps him and whom he's in love with. The mc is later captured by a demon, there's this big fight between the righteous cultivators and the demons, mc gets captured/defeated which is all according to the ml wishes. A girl who was actually supposed to be the protagonist of the novel also transmigrates into the novel and the ml tortures her and finds out the mc is actually not from their world and their world is a novel. He does something that join/connect his soul to the mc's so when the mc returns to the real world he also comes into the real world. Does anyone know this novel?
Is it The Transmigrated Senior Martial Brother? I didn't finish it, but the start where the MC disguises himself is similar.
Some of that reminds me of Scum Villain https://www.novelupdates.com/series/the-scum-villains-self-saving-system/
it has to be “a smile from a villain”. I remember reading exactly what you described, I dug through all my reading lists for it