Team Z are challenged to an athletics showdown by Team T to determine who should be the city's protectors. Later, Ashura uses a disguised Mechanical Beast Girl named Minerva X to try and disrupt the Team Z's teamwork by getting close to Z-chan. Afterwards, whilst relaxing at a hot spring, the girls meet idol Youko Lorelei, whose performance is interrupted by the Underground Empire's Mechanical Beast Girl, Belgas V5, causing whoever listens to it to become drunk with good feelings.