After Yuuji suddenly disappears, the girls at Mihama Academy notice him on the TV screen. What`s more, it`s being reported nationwide that he`s a suspect in a terrorist plot which will likely turn into an international incident.

A formless supporter, "Thanatos," suddenly supports Amane and the others. "Her" objective is also to liberate and rescue Yuuji Kazami. Thanatos and the Mihama girls` interests align and begin preparing to execute their mission. The girls are perplexed by Thanatos`s seemingly cryptic instructions that unfold via cell phone, but they bring the girls better results than they ever expected in bringing their goal to fruition.