Plot: London Detective Mysteria is a 2013 otome visual novel video game for the PlayStation Portable created by Karin Entertainment and published by Marvelous in Japan. In 2016, Karin Entertainment self-published a PlayStation Vita port known as English Detective Mysteria: The Crown. Wikipedia
Plot: Animamundi: Dark Alchemist is a Japanese gothic horror visual novel developed by Karin Entertainment and distributed by Hirameki International in the United States. Wikipedia
Plot: 100 Sleeping Princes and the Kingdom of Dreams is a Japanese puzzle and role-playing smartphone game published by GCrest. It was released on Android and iOS devices in 2015. An original net animation by Satelight was released in 2017. Wikipedia