Kyle Travel - Volume 1 - The Memory Flower

Kyle leads a pretty normal life. His biggest problem is that the kids at school keep making fun of him and his little sister, Selena. But on the day he turns seven, his life changes drastically: he is whisked away in a great ray of light! We find him seven years later on an unknown planet surrounded by children from all over the galaxy. They all seem to have forgotten everything about their past lives.
And all are trained to develop their natural abilities and become formidable warriors. At the end of their school year there's an important contest where the best one will be chosen to rule over a planet of their own...