In the drama, it is discovered that Mirei is a four year old genius, with Ouka being her tutor. Ouka herself is a student attending Tokyo University. Sanjuro is from America, while Hotaru is found out to actually be a boy. The plot involves Hotaru, who visits Japan with Sanjuro, getting lost among the crowds of people in Tokyo. Hotaru finds an internet cafe where she/he makes contact with Shugo and asks for help. The four of them then search through Tokyo, looking for Hotaru.