S1, E5: Ichiko and Otoya decide to rekindle their sex life, but their excitement quickly turns into frustration. Otoya is haunted by Mitsuki's curse-like words of goodbye and Ichiko cannot stop comparing him to Rei. When he happens upon Ichiko and Rei together, Otoya finally learns that Ichiko had paid Rei for his services. Unable to contain his disdain, Otoya blows up at Ichiko.