Fukuzawa and Mori attempt to kill each other while reminscing about their past. Before anybody is able to finish their rival, they are stopped by their superior, Natsume Soseki. Dazai then makes Atsushi and Akutagawa work together once more to infiltrate into the Rats in the House of the Dead hideout. Despite working together, Akutagawa is inflicting by the same virus that infected Fukuzawa and Mori.