Main Story is the main plot of the game. The story focuses on 31-A major endeavours in the game which would include other involved units in the story.
Overview[]
The Main Story is divided into Chapters and later divided into Days with repeating routines. In later chapters (starting Chapter 4), the chapters were divided into Parts, which contains a subplot of its own but shares thematical link between each other.
Main Story tend to be always long, averaging 14-20 days for each chapter (and later, parts)