It serves as a side story to the original game.

It is a side story during the main game (set after the second and fourth levels).

After they kill their father, he kills them in a series of side stories.

He is, for the most part, only shown in the comic through side stories about him.

Often his side stories are more interesting than the content he brings to the show.

It consists of four main parts and several side stories.

During the novels' original run, several side stories were published.

There's always some side story that becomes the issue instead of the music.

The second side story takes place five years before the start of the main story.

The light novel currently has 36 volumes, including three short stories and a side story.