In fifteenth century Rome, witches have declared war against humanity. A young man named Nikola, whose parents were cruelly murdered by a witch before his... more>> eyes, discovers that he is now the key to winning the war. Using sorcery skills acquired through years of careful study, Nikola must revive twelve witches known as the “First Witches” who will become his allies and weapons to defeat the enemy. But there is one small hitch: in order to revive the witches from their eternal slumber, Nikola must form a marriage contract with each one. Just how many witches can Nikola marry in order to save the world? <<less

Utsugi Souya has lived life avoiding the spotlight. He always tries to follow the rules and be a good samaritan, especially when it came to environmental issues. He would go as far as being late to school if it meant protecting the Earth by separating the trash in the correct order.... more>>

One day while walking home from school, he finds that someone has messed with his trash. His trash has been left behind because the different types of trash were mixed up. The perpetrator kept mixing up only Souya's trash everyday, so one day Souya decides to lie and wait to catch this annoying criminal. That day, he finds that the perpetrator was actually the recently transferred classmate, Tokisaka Koyomi, and she reveals that she has come from the future to stop all environmentally friendly activity. Now, Souya and Tokisaka will have to live together and destroy the environment so that Tokisaka can go back to the future. <<less