Tyrannos Japan reviews the fight between Ryota and Nobutaka, seeing that Ryota is able to anticipate Nobutaka's strategy, in which he chose to back away and leave behind the cache of his equipment. Nobutaka leaves after he realizes who he was fighting, leaving Ryota to wonder how Nobutaka knows his name. When Ryota, Himiko and Masahito return to Kiyoshi, it dawns on Ryota to remember that Nobutaka was his best friend back in high school, up until Nobutaka slept with Ryota's crush named Serizawa Aiko. After Masahito mentions that more food supplies will arrive at noon the next day, he suggests that a serum is needed to heal Kiyoshi's wounds. Ryota and Himiko bring Masahito to Shiki's house to retrieve the medicine. As the three split up, Masahito finds some expired medicine and puts them in his case, which he entrusts to Ryota, who has a strange feeling about this. When Ryota signals Himiko, she comes running back and shouts at him to drop the case. This is because Masahito discreetly placed a Remote Control BIM inside the case, which soon detonates.