According to Natalie News, management agency Spacecraft Entertainment admitted that seiyu Hirano Aya will quit the office and her official fan club "Hirano Juku" will be closed on August 20th. Web magazine Cyzo reported that there has been a discord between Hirano and the agency and she was trying to find a new management office. She apologized to the office by prostrating herself on the floor when the plan of the transfer was exposed to the staff. Hirano stopped posting tweets on her twitter since photos of Hirano kissing man on a bed were leaked on a gossip magazine last month.

Update
Hirano posted in her official blog that she had been negotiating with Spacecraft agency over the termination of the contract with them since last year. She said her new management office has already been decided.

Update August 21st
Hirano has launched a new official website and announced that she entered a new agency "Grick", which mainly does the management of TV personalities and idols. No seiyu other than Hirano belongs to the office.

Sources: Natalie, Cyzo, Hirano's official blog
Related topic: Hirano Aya Banned From Appearing in Newly Started Anime By Her Manager