Ep 15. Surge

Both brothers, along with Mikuriya, slowly make there way away from the watched area. It's not easy though- the enemy's power is so overwhelming that Naoya can barely go any further. As their distance between the lab grows, Mikuriya tells them about the past and even information about Shouko. She became so powerful, that she chose to become pure consciousness and help other beings with special powers. The brothers learn that if they strengthen their powers, they too can become pure consciousness like Shouko did. Then the people who destroyed the lab attack Naoto. While rushing to help his brother, Naoya notices that the powers seize, but only to combine and become one. Naoya and Naoto reactivate the barrier with their powers are repel the trespassers. After their ordeal, they return back to the city. Mikuriya decides to leave Japan and says goodbye. Noaya suddenly disappears before Naoto even has the chance to help him.