Two weeks pass and no rescue is in sight and the injured and malnourished girls start dying one by one. When their teacher returns without help, all remaining hope is lost. When sensei claims to have hunted down a deer, Kazuki is suspicious and decides to set out with Amane in tow. She shows Amane that the 'venison' that the others ate was in fact something else and that the remaining survivors have gone mad and are active participants or do not care. When the others close in on the fleeing pair, Kazuki stays behind as a decoy to let Amane escape. At first hailed as a miracle survivor, Amane soon faces questions as to why she was the only one who survived. Suffering from nightmares, the relentless public pressure convinces her that she must be punished for living when everyone else died and that Yūji is the person with the greatest right to punish her. She even asks Yūji to kill her. Yūji instead asks her to live for his sake as her punishment in the hope that since he has accepted her, even knowing her past, she will come to forgive herself.

Yūji accompanies Amane to the site of the accident so that she can finally put the incident to rest. On the way, Yūji is stopped by a man who claims to be Amane's greatest fan. After she pays her respects to her dead friends, Amane leads Yūji to a location on the map that Kazuki gave her where they find a note hinting that Kazuki is still alive. Meanwhile, the man who accosted Yūji has entered the Academy and taken the other girls hostage and demands Amane's presence. When they return home, Amane prepares to give herself up and Yūji, having been able to listen to the goings-on in the school via cell phone, comes up with a plan to end the standoff. The hostage taker is revealed to be the father of Chiaki Sakashita who has not been able to deal with the death of his daughter and wants to kill Amane for surviving. Having decided that shooting Amane would be too easy a death, Sakashita removes her to the washroom to have his way with her. Yūji is able to snipe Sakashita through a 10 cm wide field of view from over 900 m away, ending the hostage situation and reuniting him with the girls. Following a time skip of one year, an unidentified boat enters Japanese waters. One of two passengers fires a rocket at the Coast Guard cutter and helicopter. The other opens a music box.