Touji Hazuki, a high school student in Tokyo, has lost something precious and spends his days lonely indulging in graffiti——. One day, a mysterious figure claiming to know the truth behind his father's death suddenly sees through his true identity...!? Syuuhei Kamo of "GANGSTA:CURSED." and Seiichi Shirado of "Kaijuu Jietai" present a modern armchair detective tale that makes full use of Open Source Intelligence!