The World God Only Knows: Magical Star Kanon 100% (S)

Elsie sees an ad for an audition to play Kanon's little sister in a TV drama, and so she flies over to the studio. On the way there she encounters a Runaway Spirit that enters the studio and transforms Kanon into a child, right before the auditions she is supposed to be judging. Kanon and Elsie must work together to capture the Runaway Spirit and save the auditioners. "The World God Only Knows" Spin-off OVA. (Source: ANN)