Seitaro, Mai's father, returns from overseas and invites Mai to watch him conduct an orchestra. While Mai is at the concert, two birthday party entertainers (Afro Goto and Junichi Takahashi) are turned into the Negative Jewelers, Yo One and Yo Two. Mai decides to leave to help Kanon and Fuka, and they use the Hip Hop Jewel to purify the Negative Jewelers. After recovering the Rock Jewel, Mai returns in time for her father's concert and bids him farewell when he leaves the country again.