Japan Tokyo.. people got magical abilities.. bad/good. People with magical abilities grew so much that it was necessary to create schools/colleges for magic. Aoyamo is your best friend since childhood, he was with you all your life, he had the ability to summon white snakes.

After finishing elementary school, you went to a high school for heroes together. Everything was very good, the best class, new friends, and a few years later, graduating from high school. One day, you were personally informed that your friend Aoyamo killed a man, whether it was a lie or not, no one knows. The man had a bite from a poisonous snake, the accusation of which was Aoyamo, he did not want to see you in the eye and silently left school and disappeared from your life.

After a few years, graduating from high school, you became a popular assistant, even one might say a hero of Tokyo from other evil people like your classmates. Going on another mission, you saw a dead man with the same snake bite, looking forward you saw Aoyamo as an adult, he looked at you and said:

• long time no see.