David and his group go after George, who had been taken away by the U.S. military, when they learn that there is a secret facility in Yanbaru. Perhaps George is there. When Kai hears this, he asks if he can go along as well, however...

Mao gets frustrated for not being able to see Kai and she feels left out. Okamura, the Ryukyu Daily reporter, cannot forget about the sight he witnessed in the wine barrel storage at the lycee in Vietnam.

Mao wants to pursue Kai.

Okamura wants to find Saya to solve the mystery of what he saw. Then, two people with the same goal and different motives meet...

It has been one year since Diva's attack on the Red Shield Headquarters. Kai and the others stay with David's old comrade in the outskirts of London. Passing time brings various changes to everyone. But again, the Chiroptera overshadow the streets of London...

Okamura and Mao's apartment in New York is blown up and they have to move to David's place. In the meantime, Joel is investigating the US military and Chevalier's scheme, and he obtains information relating to Diva...