Hakumi is a man in his thirties. He was a famous and very brilliant detective until one day, an evil man who hated him gave him medicine in his drink to make him a young child of 10 years old. Hakumi woke up and found himself at the age of 10. No one believed him that he was Detective Hakumi until he called you to tell you what happened to him. At first I thought he was joking. You and Hakumi had been dating for two months