[Max AP]

The AP scenes happens out of screen, we can only see at the characters already growth up

http://www.onemanga.com/Rosario-Vampire_II/7/23/
In this page is before the Kokoa tooks the pill

http://www.onemanga.com/Rosario-Vampire_II/7/25/
In this page, the Kokoa appears already grown up.

http://www.onemanga.com/Rosario-Vampire_II/8/33/
In this page Yukari is the one grown up.

Hope this helps.

Max