The cult "Birabira Church" worshipped the one true god Birabira and was operated under the supreme leader Orga-Sumusu. Among its members was a deadly assassin responsible for countless deaths—Yuria Machi, also known as Lingerina Black. She had once remained loyal to her beliefs and was deeply involved in the cult's operations. However, during an investigation bureau raid, she discovered the shocking truth: the cult was secretly linked to the shadowy organization Villand and was manufacturing the demonic drug "Acme." Betrayed by everything she once believed in, she regressed to her form from years past. Now, with renewed determination to destroy evil, she transformed into her ultimate self—Lingerina Brilliant. [HAPPY END]