If it were that easy to figure out, we wouldn't have been in this cold war for so long.

Shouji is a guy that doesn't know when to give up...

He proposed a deal with Kushiro-sensei. Shouji would tell him where to find the bombs and how to disarm them.

In return, Kushiro-sensei would remove the tracking device he implanted in Niwa Serina's body.

We searched for those bombs for years, but didn't find a single one, so it's possible he just made it up on the spot.

But Kushiro-sensei couldn't bring himself to kill Shouji.

The bomb implanted in Niwa Serina,

the bombs Shouji scattered across the country,

until all of them are out of the picture... this incident will forever remain unresolved.