On her first day of work at her father's small production agency, Tsumugi Takanashi was not expecting to be made the manager of the agency's new male idol group. Though shocked that her father is trusting her with such a major project so soon, Tsumugi vows to do everything she can to support the seven young boys. After seeing how well the boys work as a team, Tsumugi meets with her father and learns that her first job as manager will be to cut four boys from the group. This is because her father believes seven idols are too much to manage, and the current top group, TRIGGER, only has three members. After holding an impromptu audition, Tsumugi returns to her father and boldly declares that she refuses to cut anyone from the group, as each member has a unique allure which collectively enhances the group's appeal. She returns to the boys and they are thrilled that none of them will get to miss out on their dreams. Together they become IDOLiSH7, and prepare to take on the fiercely competitive world of idols.

Ryouhei Arisu is a high school student with no ambitions and just wants to escape from what he feels is a meaningless reality. One night when he is with his two friends Daikichi Karube and Chouta Segawa, they see an abnormally large firework shoot into the sky, an event which signals a permanent change in their lives. Blinded by the incredibly bright explosion, the three find themselves transported to what is known as the Borderland. The only inhabitants of this world are participants of a deadly game where specific tasks must be accomplished if they wish to survive. As the three begin playing to determine how they can get back home, Ryouhei finds himself feeling alive for the very first time in his life.

Specials bundled with the iDOLM@STER Xenoglossia DVD releases. Episodes #1: Izayoi-ryou e Youkoso! #2: Nantettatte Idol! #3: Komugiiro no Mermaid #4: Watashi ga Obasan ni Natte mo #5: Haru nanoni #6: Sekaijuu no Dare yori Kitto #7: SWEET MEMORIES #8: Itoshisa to Setsunasa to Kokoro Tsuyosa to #9: Episode 26 epilogue

Team Satomi has just been deemed as the winners for the IG-2 lower league and now join the top IG-1 competition. But it's not going to be easy. Young pilots Takeshi, Liz, Amy, and River are going to have to be a team to be number 1, however one thing leads to another with these four. Most important of all, their opponents overwhelm Team Satomi in every aspect, including strategy and skill, as well as funding. One thing is for sure, this is not going to be an easy year for Team Satomi.