Investigator in the World of Detective Conan

After transmigrating into the world of Conan, I thought this would be an ordinary journey through the world of deductive science. But a mysterious coin in my wallet and a special diploma seem to prove that this world isn't so simple.

Conan: Yanan, what are those things? What do you know?

Haibara: That's my sister. No, impossible. My sister is already dead. Who are you?

Yanan: Ignorance is the world's greatest protection for humanity.