Episode 15 Episode 15

The Bingo Union suddenly prepares to go into action. Koichi smuggles himself into the country to try and discover the reason. There, he learns that the country is preparing for war by mistaking a failure of the military line for an attack by the neighboring country. But the line failure is later proven to be caused by a small submarine carrying the prime minister. The submarine seems to be stuck and is running out of oxygen. Koichi goes to rescue the submarine crew.