Beyond Episode I: Chelsea's Choice / Brotherhood

From the back cover

A group of teenagers lead by Chelsea and the half brothers; John and Mario, has to survive to their hardest years of their lives without any adult supervision. They must decipher the meaning of life, and become adults by themselves.

The kids will face regular issues that were usually solved by the adults, like: the food, the economy, human waste management, women's menstruation, the birth of a new human being. Meanwhile, they must live among them, peacefully, and learn how to solve their conflicts without hurting each others.

But what they do not know is that they are in the middle of a conspiracy that took millions of years to take shape. They are just pawns of godlike beings.