story:

Episode 12: The End of Summer

Shinpei learns that Ushio's death is connected to a mysterious island ritual called the "Shadows' Feast."

He also learns that the Shadows are not the only threat to the island, as there is a group of humans who are working with them.

Shinpei must find a way to stop the Shadows' Feast and save the island.

Points:

The Shadows' Feast is a new piece of information that Shinpei learns about.

There is a group of humans who are working with the Shadows, which is a new threat that Shinpei must face.

Shinpei must find a way to stop the Shadows' Feast and save the island, which is a difficult task.