"Times may change, and the world may turn completely upside down, but one thing is certain. As long as humanity exists, the thirst for power will always end up corrupting them."

The Earth has completely changed due to the effects of a meteor in A.D. 2057. Ruled by mythical creatures for several thousands of years, 4 Royal Kings were able to free humanity from the fear of these creatures, and humans once again ruled over the world. Divided into 4 kingdoms, these Royal Kings and their descendants have been ruling the world for the past 2,000 years. United together through a treaty, the 4 kingdoms created what is now known as the World Regime, a government that looks over the whole world. Over the past centuries, the World Regime has slowly been corrupted, with many corrupt officials and politicians ruling over the people and abusing their power. Because of this, many criminal organizations have risen up, putting many to fear with their acts of rebellion against the World Regime.

One day, a fateful encounter led Hiro, a young, 22-year-old man to change his life completely. While roaming around the streets of the poor, rural village of Bartos, Hiro meets two young women who invite him to join the criminal organization, Lionheart. What further adventures will Hiro face as he enters into this new life of crime? What mysteries are left to be unveiled in this world? Follow Hiro as he journeys together with Lionheart against the corrupt and powerful World Regime.