Tommo and the others are astonished to see a strange building rising out of the sea. They wonder if it's really a lighthouse, but sensei and Yarai are already on their way in. Tommo wonders if they'll be able to send a signal to the other side of the tower, but he's not sure. He also wonders if the two are in love, since they're both older than he is. They're alone together, he says, and they've forbidden each other to be together. He wonders if there's something in the tower that they need to get in. He's sure there is, since the tower is covered in rust. The gate is open, but the smell of the stone work makes it impossible for them to get into the tower.