Tyrannos Japan reviews the fight between Ryōta and Nobutaka, seeing that Ryōta 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 Ryōta to wonder how Nobutaka knows his name. When Ryōta, Himiko and Masahito return to Kiyoshi, it dawns on Ryōta to remember that Nobutaka was his best friend back in high school, up until Nobutaka slept with Ryōta'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. Ryōta 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 Ryōta, who has a strange feeling about this. When Ryōta 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.