The Substitute Messenger of the World of Kexue

My name is Ueno Shinji, a sophomore at Teidan High School and an ordinary student. Until that day, I was hit by a car. When I woke up, the tattered arrowhead in my wallet was shattered into pieces, and I got a stand-in ability called "Melancholy Blues". It can "play back" everything that happened in the past at a specified location, like a rewind video recorder. I can see it, hear it, and even smell it - but I can't touch it, I can't change it, I can only be a silent bystander. Very useless? No. In this world full of locked-room murders and perfect crimes, being able to "see the past" is about holding a trump card. Until I witnessed that night with my own eyes—— In the corner of the tropical paradise, I saw the arrogant high school detective Kudo Shinichi being drugged by two men in black, and his body shrank into a child as he screamed. And I, on the second day, saw this drama in its entirety with "Melancholy Blues." At that moment I understood: this world is far more dangerous than I thought, and also far more interesting than I thought. So, I made a decision—— Kudo Shinichi became Edogawa Conan, and I generously let him live in my house. And I, Ueno Shinji, began to "miss" the karate master who once saved me in a car accident and is now worried about my missing boyfriend.