Initially, Rikuo and Masaki believe that Rina is a sex android and that Koji is her master. During an argument with Koji upon seeing that he may be involved with another woman, Rina's displays a nervous twitch in her leg and goes to a secluded area of the cafe to calm down. Rikuo follows her and discovers that she is an android. Rikuo tells him that she was a bodyguard android that was illegally modified to be a sex android. Rina's leg was injured during an attempt to kill her master, who abandoned her in the ensuing chaos, but she can not get it repaired due to her illegal modifications. Eventually, she and Koji work out their differences and their relationship continues.