The source of the evil within Kowa Acaedemy has been revealed to be the international organization Esset. But to the good men of Weiss, this brings more questions than answers. Yoji investigates this evil, only to uncover a painful new choice. In exchange for his loyalty to Esset, they will erase all of his painful memories. Omi forsees a dangerous future for Yoji and the others if this happens, and forces him to call off the mission. But Ken, Yoji, Aya and Sena all refuse to retreat!