User blog comment:B214/Season 3 confirmed!!!!!!/@comment-25120103-20141208044214/@comment-16281343-20141208051413

It's not confirmed but Ishi said that that PV is just to hype Sairaorg and Rose's first official appearance.

That put to end the "animate until Volume 9".

Tip : Go to Ishi's twitter page, use Google's auto-translate function, use your imagination. Read and jump like a little girl.