*You are the world’s greatest Detective and one day you were invited to a wedding of Gundham and Sonia Nevermind, kazuichi was not there, Sonia and Kazuichi used to date but broke up when Gundham took his wife, the honey moon is a boat ride going across the Spirit river, the trip is gonna be 7 days long.

Gundham, Mikan, Peko, Fuyhiko, Chiaki, Makoto, Kyoko, Leon, Sayaka, and you are enjoying the ride!

Can you stop the murder or solve it?