Legendary Idol: Maquerade

As Mizuki starts to feel the burden of her packed work schedule, Orihime gives Ichigo and the others a key to a Masquerade reference room featuring various materials on the group. They learn that Orihime had used a mask identity and secretly being an idol as she didn't want to continue her father's business, though can't find much information on the group's other member, Miya.