* Based on the arcade raising simulation game of the same name by Bandai Namco Games.

Music in the world, included in Honey Sound:
Haruka, Chihaya and Azusa are chosen for the trip to Vacation Island. As Ritsuko is chosen to accompany them in place of the Producer they made her perform with them. How are they going to win the festival when they discover Jupiter is also participating and they still can't decide how to approach the show.

Music of love, included in Groovy Tune:
Miki, Yukiho, Makoto and Takane are chosen this time. Miki decided they should do a love song, despite the others lacking such experience in romance so she comes up with the idea to have each member have a date with the Producer to learn more about love.

Music is a friend, included in Funky Note:
The Producer brings Yayoi, Iori, Hibiki, Ami and Mami to the resort for the musical festival. Iori suggests they spend their first day playing around. The next day, however, Iori discovers she has lost her precious rabbit, Charles.

Source: Wiki

Note: Three OVA episodes included with the three individual versions of the PSP game The iDOLM@STER Shiny Festa: Honey Sound, Groovy Tune, Funky Note.
Each episode takes place in the same time frame, revolving around a group of idols being chosen to attend an International Music Festival on Vacation Island, but the idols chosen are different in each version.

AniDB | MAL | TVDB

Other: The Idolmaster