Double Penetration, the Devil of the Demon Gate Just Wants to Kill, Kill, Kill, Kill

(Single female protagonist + cultivating immortals + doomsday + decisive killing.) My name is Xia Tian, and I live in the apocalypse. The plug-in is that you can gain skills and skill points by reading books, but there are zombies and monsters everywhere in the apocalypse, and there is not even a intact library. If you want to read a complete book, you have to risk your life to go out. My name is Lin Shiyun, and I live in the Demon Sect. The plug-in is that as long as you kill the enemy, you can improve your attributes and gain skill points. However, the competition in the Demon Sect is too fierce. Even if you kill a monster, ten people will want to kill it. That day, the two of them discovered at the same time that they had actually entered each other's body. Xia Tian: Damn it, why don't you read so many books? It's such a waste, I'm going to take off. Lin Shiyun: I'm shocked. There are monsters that can be killed so casually without being robbed. I'm about to take off.