Cyber Team in Akihabara

Hibari Hanagokanei is a very enthusiastic preteen that would love to have a patapi mascot (a very popular tamagotchi-like toy) and dreams a lot about a boy, whom she calls "ojii-sama" (prince). One day, an ecchi old man tells her that her prince is waiting for her in the local hill. Hibari runs to meet him, but she only finds a patapi mascot that falls of the sky into her arms. Not only has she proven that his prince is real, but he gave her a gift. Nevertheless, a big-breasted woman tries to steal her new patapi, which transforms into a Diva.

Synopsis from Anime News Network