n Shuumatsu no Harem Episode 9, titled "Feast of Debauchery," the narrative intensifies as Reito Mizuhara and his group delve deeper into the mysteries surrounding the MK Virus. Their investigation leads them to an abandoned hospital, where Sui inadvertently uncovers a hidden air duct. Navigating through the duct, they stumble upon a clandestine underground laboratory. Inside, they face immediate hostility from its occupants, who attempt to eliminate them. However, the timely intervention of American mercenaries, led by Ms. Pope and Ms. Mansfield (Chloe), neutralizes the threat. The group discovers a time bomb within the lab, compelling a hasty escape via helicopter just before the facility is obliterated.