Yuuji invades Oslo's ship alone and takes out several of the latter's men. Meanwhile, Agnes and JB inform Yumiko that they are currently working on disarming the bomb Oslo planted earlier. Kazuki and Amane are seen in a dark room where the former is inside a capsule-like chamber where she deactivates the Thanatos System and asks Amane about her desire to associate with Yuuji after learning everything about him. On the deck of Oslo's ship, Yuuji meets a man who looks just like him but with white hair. The look-alike, who calls himself Du Pont, also refers to himself and Yuuji and Kazuki's brother. The two engage in an intense and fast paced fight to the death. Yuuji appears to have the advantage at first until Du Pont injects himself with a booster drug and tries to make Yuuji do the same but he refuses. With the drug boosting his physical abilities, Du Pont gains the advantage which forces Yuuji to take the drug as well. The two fight evenly but Yuuji ultimately wins and kills Du Pont. Despite his exhaustion and injuries, he finally arrives in Oslo's office. Oslo welcomes him warmly but after seeing that Yuuji has no interest in listening to what he has to say, Oslo prepares to fight and draws a katana that once belonged to Asako. They engage in combat but Yuuji, in his current state, can only dodge. Eventually, Oslo disarms and stabs Yuuji who uses remaining strength to push Oslo to his desk where Yuuji grabs a pen and stabs Oslo behind the neck, killing him. Yuuji removes the bomb that was strapped to his wrist using the key Oslo had and slowly walks away from the ship as it explodes. Just as he gives up all hope of escaping, he sees a vision of Asako and finds an exit just as the bomb detonates and destroys the ship. Two years after Yuuji's battle with Oslo, the girls have settled down on Yuuji's island. Makina is seen collecting some eggs from the chickens while Sacchi goes fishing on the beach as Amane arrives by plane, having gone to a supermarket in the mainland. Michiru is seen doing homework while Kazuki looks over her as everyone arrives, including JB and Chizuru. They reveal that the new Mihama Academy building has been finished and the girls can return to school. Meanwhile, Yuuji, who survived and took half a year to recover from his injuries, is seen fishing while talking with Yumiko who reveals that CIRS has been disbanded but a new organization will be created in its place but Yuuji has no desire to return. He then questions his survival as he believes that he is not yet meant to die causing Yumiko to tell him to live for everyone's sake, especially hers and everyone later takes a group picture togther. As Yumiko narrates and reflects on their experiences, the other characters of the series are shown to have returned to their normal lives and jobs. During the final scene, Kazuki is seen on the beach as Chizuru offers her a drink. Kazuki then takes off her metal arm and takes the drink, much to Chizuru's shock as she had believed the arm was a prosthetic when, in fact, it was actually a toy Kazuki wore because she thought it would be a funny joke causing Chizuru to remark that her jokes aren't funny at all.