In the 20th century, the great disaster "Falling Stars" hit the earth, and most of the world's cities were destroyed. However, the unknown element found in the meteorite, the universal element, accelerated the development of human science and technology, and finally gave birth to a new human with special powers called the "Star Vein Generation". The story takes place on the stage of the world's largest comprehensive combat entertainment project "Star Wars Festival", surrounded by six academies, the aquatic school city "Rikka" commonly known as the hexagram. A special student Amagiri Ayato who transferred to the high school department of the Star Guide Hall Academy vowed to fight in this city in order to realize his wish.