Setsuna wakes up on an island time has left behind with no memories.

Setsuna begins to research soot blight syndrome to understand what keeps the island isolated.

Setsuna, Sara and Karen try to keep Rinne from come out during the day.

Although it was by Karen’s request, Setsuna does something unthinkable. They go to the mainland so that Karen can escape and go to see her mother. Why did she cry while Setsuna watched over her? Meanwhile, Sara is getting close to something.

Sara thinks she knows why Setsuna came back in time and believes they are destined to be together.

The darkness has lifted for Karen and Sara; Rinne bids farewell to the past.