I Evolved as an Intelligent Zombie in the Multiverse Chapter 26: Just Some info

So by now, you must have realized that the world is much wider than you or Atlas thought, and the first volu is coming to an end with the story of the movie. Before the second volu, there will be many chapters exploring the world and setting up the second volu, which would follow the story of.....

So 1.5 Will setup the second volu.

And 2.5 will setup the fourth volu.

And after it third volu will be in different world I am thinking of Tokyo Ghoul or Demon Slayer, as he needs a lot of experience to level up beyond 15 levels.

Fourth volu will return to the world.

So before that, because I am going to introduce a character, I wanted to clear the situation of Harem As the second volu brings them all to Raccoon City.

Alice

Ada

Jill

And??? Please provide guidance for the future, as I aim to take the high road by introducing them earlier than the Atlas eting.