The RX-8 is Mazda's proud rotary-engined successor to the third-generation RX-7. The RX-8 is notable for the fact that, despite being a full-fledged sports car with a rotary engine and FR drive, it is a family car with seating for four adults. This was at the request of Ford, Mazda's parent company at the time of its launch, as it was considered an absolutely essential condition for the development of a new rotary engine-powered car in terms of marketing strategy, as it was a four-seater that could be sold in large numbers. In order to meet the conflicting requirements of a family car while delivering full-fledged sports car performance, Mazda adopted a unique mechanism called the 'Freestyle Door', which allows the front and rear doors to open in a double-swinging motion. Within these difficult constraints, Mazda's engineering team succeeded in giving the RX-8 the very best qualities of a sports car. The 13B engine used in the RX-7 had been replaced by a turbocharger, and the RX-8's NA design and numerous improvements resulted in higher revs and lower fuel consumption, while at the same time making the engine lighter and more compact, which greatly benefited the car's turning ability and lower centre of gravity. Mazda named the next-generation rotary engine with these improvements the 13B-RENESISE. Although the 13B-RENESISE engine had less power than the turbocharged 13B engine in the RX-7, it successfully improved environmental performance and fuel economy, which had long been regarded as the weak points of the rotary engine. This complete improvement of the engine was also an essential measure to make vehicles with rotary engines compliant with the increasingly strict emission regulations of countries all over the world. In 2003, the RX-8 made its debut. In 2004, the year after its debut, the RX-8 achieved annual sales of approximately 60,000 units, an unprecedented sales record for a sports car. However, it was not only in terms of sales and marketing that the RX-8 excelled. The RX-8's braking and cornering performance were regarded as the best of any Japanese car, and Mazda's engineers succeeded in achieving the seemingly impossible goal of creating a car that was both a family car and a serious sports car. In 2008 and 2010, the racing version introduced by Mazda USA won its class at the Daytona 24 Hours in the USA, beating racing machines developed by Ferrari, Porsche and others.

In a world where warriors with the super-powerful armour "THE SUMMIT ARMOUR" dominate the battlefields. Kageaki Minato, who calls himself an official policeman, wears the red sword-armour 'Muramasa' and sometimes challenges vile serial killers and at other times the tyranny of military soldiers, using the might of his own strongest warrior to defeat them. But he never claims to be righteous. When he meets a demon, he kills the demon; when he meets a Buddha, he kills the Buddha" - these are the words he utters when he joins with the sword-armour, the words of truth that tell of the past and foretell the future. He kills. Not only evil, but also good people who were oppressed by evil. ...... Is this surprising?　No. Because the sword and the armour on his sword are not only the same, but they are the same. Because the name of his sword-armour is Sezu Uemonchu Muramasa. This is the same Muramasa who once transformed the whole of Yamato into hell, the cursed 'Yokko'.

The protagonist's sister-in-law who loves her dad too much and is out of control. A bit of an idiot. The true identity of the White Silver Demon King, Silver Star. The main character Minato Toukeiaki's biggest partner and beloved sister-in-law. She is the real daughter of the main character Minato To Keimei. She wears the cursed Tsurugi Armour II Muramasa and repeatedly commits mass murder in various parts of Yamato. In order to stop the light, Kageaki wears the third generation Muramasa and continues to pursue the Silver Star. In the first round of the popularity contest, she lost to Minato To Kageaki and fell in the third round, and in the second round she was ranked fourth.