The story opens in a high school classroom, and introduces a small portion of Kyle's past.

This story introduces the concept of the caste system within Martian society.

In addition, the story introduces the aliens' traits and behavior.

This story introduced some of Kane's background, including the fact that she is Jewish.

The story opens and quickly introduces the four protagonists before.

This story introduced the first new opening title sequence since the series began.

If a code appears in bold, this means that the story introduces the character.

This story introduces Raphael, a "man" looking for forgiveness that will never come.

The story also introduced the terrorist group Total War, which became significant in later stories.

The story introduces you into the lives of the young generation from real-life obstacles to seeking a lover in the modern society.