El verano en que Hikaru murió, 7

The impurities have multiplied in the area since "something" replaced Hikaru. Yoshiki and his companions have set out to prevent their spread by closing the holes that connect to the other world. However, these can only be closed from the other side. To achieve this and be able to return later, "Hikaru" proposes using the bond between himself and Yoshiki, who hasn't taken his eyes off him. Meanwhile, Asako and Tanaka try to negotiate with an impurity to close one of its holes.