To Aru Majutsu no Index II is only into its 2nd episode and is already providing a full service episode, complete with naked bathing Index and a scene of suspected nun cunnilingus.
Fans also spotted an obvious Saten cameo in episode 1:
An even more obvious Biri-Accel cameo:
Omake (Ika Musume and Index look somewhat similar in case this still hasn’t sunk in yet):
A certain rotating maid is proving popular: