After an incident that left Koh Fujimura grievously injured; losing sight from both eyes, the college student undergoes surgery and miraculously survives. However, this event significantly changes Kou’s life, as he gains extrasensory perception abilities. Soon, a woman appears, and the boy’s life changes overnight.
High-schooler Nishino Aoi is a history nut who’s in the archery class at his school. Due to his skill in archery, he sometimes thinks that he’s more suited to the Sengoku period of Japan. If he lived then, he imagines he might even have a girl like his clubmate Seno-san as his wife. As it is, Seno-san is his friend and the girlfriend of his childhood friend Kouta.
When a mysterious fog covers the school, Aoi gets his chance to experience the Sengoku period first hand. The entire school is transported to a time period that Aoi pinpoints as somewhere between 1576-1582, near to Azuchi Castle. However, things are not as bright as he might have imagined. Armed men accompanying the historical figure Hachisuka Koroku attack the school, brutally murdering teachers and students. Will Aoi and his friends be able to survive this deadly era?