Gunjou Senki

Nishino Aoi is a high school student passionate about history and a member of the archery club. He often imagines himself in the Sengoku period, picturing a life with his clubmate Seno, who is friends with him but is in a relationship with his childhood friend, Kouta. One day, a strange fog envelops the school, transporting everyone to a time Aoi identifies as between 1576 and 1582, near Azuchi Castle. Instead of a romantic or idealized past, they face danger as armed men with ties to Hachisuka Koroku attack, killing teachers and students. Aoi and his friends must find a way to survive in this violent historical setting.