War gives birth to weapons. Some of them marvelous and others horrifying. Some say soldiers are the best. Others would disagree. Sadly the students of Beacon are about to learn sometimes the best weapons aren't the ones you can fire or swing. Sometimes they're the ones you can't touch or even expect. Like a friend... or a virus.

Under other circumstances what they would have been doing would have been called a field trip, but in this case it was a vacation. For Akira it was a trip down memory lane, and for Sadayo it was a new opportunity to learn about her boyfriend. In the end Sumaru City turned out to be full of surprises for both of them.