Light is the resource of life. Mysterious monsters and robots target the powers of light: R (Red), G (Green), and B (Blue). However, no one notices this… except for three children. Ryu is a foolish, simple, and mischievous boy who states without hesitation that his dream is to become the conqueror of the world. Guccho is a mechanical nerd, a glutton, and a coward. Becky is very cute, but she has a very twisted personality. They have encouraging friends, such as Rosso, Gibson, Bo, and others. These are various aliens who usually transform into animals. Through exchanges between aliens with different principles, purposes, tastes, and hobbies, they will learn the importance of communication.