Zatch is out playing when Naomi chases him down and steals his lunch. Zatch distraught over the loss is comforted by a giant old woman. The woman reveals her name to be Nana Boba and proceeds to tell Zatch she is searching for the Hiromi, the soon to be wife of her son. Zatch volunteers to help her and suggests searching her son`s house. There, Zatch catches Hiromi`s scent and tracks her down. Zatch asks Nana what if Hiromi was someone who wore cheap jewelry and a short skirt, she would beat her up. Zatch spots Hiromi and tells Nana. He then notices the jewelry and short skirt, tries to hold Nana back. When Hiromi enters a bus, Nana runs after it and Zatch tries to stop her. Zatch soon crashes into the bus when it suddenly stops and loses consciousness. When awaken, Zatch sees Nana give Hiromi her old wedding ring and wishes her well. Zatch realizes that Nana was joking about her threat and that she knew her son would choose a good wife.