Yako and Akane want to solve a mystery where murdered women's heads have their styled hair caked in blood. Neuro says that they should solve it themselves, and it would be a chance for Yako to "evolve". By fusing Akane with herself, Yako has beautiful hair with which she can lure the murderer. Mesmerized by Akane, the man asks Yako to go to his apartment and restrains them there. Before Yako can be harmed Neuro rescues her, although he is disappointed with her.