デイグラシアの羅針盤 / Dei Gratia no Rashinban August 1st, 2033- The deep sea pleasure cruise, <SHEEP III>, with over 50 passengers on board, sinks. And four days later- "There are two survivors. One of them is Hitose Katagiri, a grad student." "And the other one is..." The completely forgotten <other survivor>. What happened in the four days until they were rescued? What lurks in the depths of the sea? And... who is the survivor? A closed off submarine, and open mysteries. This is a VN with no correct answers.