If you're looking for manga similar to The iDOLM@STER: Cinderella Girls Comic Anthology - passion, you might like these titles.
In the year 2032, the legendary idol unit "7th Sisters" suddenly retired from the industry and disappeared. That was the end of the idol industry... until two years later, when a young glory-seeking employee is appointed to be the leader of Tokyo's next generation idol studio, "777 (Three Seven)," commonly referred to as Nanastar. However, the city continues to believe that idols are a thing of the past, and Nanastar is no exception. Their slump continues, but one day a mysterious and beautiful female manager approaches you and says, "If the idols of the past are gone, we'll just have to make new idols! True "sisters" linked by powerful bonds!" The story of the idols of the future, the Nanastar Sisters, will now unfold.
Daichi Taira and Sosogu Hoshifuri were as close as anyone could get as children. Together, they made a promise that when they got older, they would live together and get married. But Sosogu moved far away one day, and he never saw her again. A couple of years later, Daichi is a regular teen living a humdrum life. Not even his parents leaving for an overseas trip can change that. Just before the pair can get out the door, his mother gives him a bit of advice among the usual warnings: "Take care of Sosogu". Unfortunately, he cannot exactly remember who or what Sosogu is...