Sometimes incorrectly credited as Kisei Gawa Tantei Jikenbo, Tantei Kibukawa Ryousuke Jikenbou: Kamen Genei Satsujin Jiken (The Masquerade Lullaby) is a crime-themed adventure game designed around the use of the touch screen. As detective Ryousuke Kibukawa, players have to uncover clues and solve a case in which a murder depicted in a network videogame ends up appearing in real life. Playing as the game's designer, you work with detectives to find out who done it. The top screen shows memos as you play, with the bottom screen letting you touch people and things as part of your search.