Hamlder's executives, feeling threatened by Rilstia's activities, plot to eliminate her by sending a powerful monster. The monster, Brosch, appears in a daytime park and attempts to abduct civilians, but Rilstia narrowly prevents it.

"It's alright. The bad guys are gone now."

To obtain information about the base, Rilstia pursues Brosch, who has fled underground. However, this was Brosch's strategy. Rilstia struggles against Hamlder's forces who attack from the darkness of the underground, hampered by the cramped space and her inability to fight as usual. Brosch avoids a direct confrontation with Rilstia, escaping immediately, seemingly luring her deeper and deeper.

New monster "Brosch" appears! With its long, sticky tongue, it licks Rilstia all over. Reacting to Brosch's gleeful voice echoing through the underground waterway, its sticky lower body also attacks her!