There's no definite answer for that because the Remake is currently focused on 8-Episode Prologues for a lot of the characters before jumping back into the Chapters again, including the MC (or Seb as how I normally refer to hin as, lol).
The initial release (0.0.1) of it includes all of his story before going to Earth in Episode I, and a small demo of Episode 2. The next release (0.0.2) will have all of Episode 2 and Episode 3.