A group of young trainers at a trainer's school face difficulties as they strive to improve their skills with Pokemon. They must band together to protect their school and their city from a crime syndicate while facing the trials and tribulations of growing up. Friendships, romances, and other hardships await them. Third story in the Through the Years series.

Slice-of-life story of a group of children at a trainer's school over the course of four years. They will grow into adults along with their Pokemon and deal with the issues that they are forced to encounter in order to become good trainers. As the trainers grow, so will the Pokemon. It will be not be an easy journey. Told from the eyes of nine different trainers every year.

In the Unity program, special trainers are given important missions. They are classified as Heaven trainers, Earth trainers, or Abyss trainers and are teamed with two members of the other two classifications. A series of different but connected criminal activities among rogue Unity members increase as a new generation of Unity trainers emerge. And what exactly is the group Neon?