Shin Mikagura Shoujo Tanteidan

Two years have passed since Tokito's sudden disappearance, and his private detective agency is now dismissed. One day a letter arrives to Shigeno from her older brother. There are rumors that Mikagura Tokito was seen in the city of Dalian.
Now, all the girls set out in search of him across the sea, leaving dissatisfied Ranmaru in Tokyo. Will they discover Tokito? And what secrets this land is hiding?