Chirico and Ypsilon unleash heavy fire, with Ypsilon pausing only to eliminate anyone who threatens to interfere in their battle. Suddenly the entire room starts to shake, and the floor drops out from under their ATs - their battle has ignited the ammo dump! Plummeting helplessly, they disappear into a deep shaft, and Rochina managed to escape with Fyana as the entire building crumbles.

Landing relatively intact, Chirico gets the upper hand against Ypsilon, but does not choose to kill his foe. Instead, he begins to dig himself out and suggests they work together to survive.

On the surface, Rochina orders his men to begin an excavation and recover Chirico. He discusses the situation with Fyana, who suspects that he is hiding the answer to a key question: how has Chirico, an ordinary human, lasted so long against Ypsilon, a Perfect Soldier?

Similar questions burn through Ypsilon's mind as he and Chirico make their way toward the surface. The PS angrily declares himself a superior being, and that he belongs with Proto-One. Chirico corrects him on the name, and Ypsilon demands to know why he calls her Fyana - a question Chirico is unable to answer. Finally, when they reach the upper limits of the shaft, Ypsilon admits that they are alike in one respect; Chirico can fight as well as he can...but Ypsilon will eventually kill him.

On that note, the Balarant excavation team finally breaks through from above and rescues Chirico. Ypsilon slips away just in time to join up with a rescue team from the Teltain, and they fight their way free. Chirico is taken to Rochina, who demands that he be ready to fight Ypsilon again. In return, Rochina orders Gotho, Vanilla, and Coconna flown out of danger.

"It seemed Rochina had kept his promise. My final battle with Ypsilon. The time was fast approaching. Will I survive it, or will he? And if I do survive, what then?"