The case in question is chapters 115-117 of Yankee-kun to Megane-chan.

The story starts off without a hint of mystery. The new student council is taking a trip to a beach-side inn to plan for the upcoming school festival alongside the old student council made up of the main characters. They blow through their meeting to get as much fun in the sun as they can and then relax at the inn when night falls. But when they find Izumi has been attacked and is covered in seaweed and fish. After talking to a local hooligan who works at the inn the group discovers they have triggered the wrath of a local sea-god. They barge into the only other occupied room in the inn and find an ominous message that they all shall feel the wrath of the curse. Soon they are being taken out one by one in an equally bizarre manner. Can Shinagawa discover who or what is behind the attack before they are all subject to the brunt of this fearsome grudge?
Continue reading →