What episode (or ova) does Xenovia kiss Issei as a thank you?
If memory serves, I don't think Xenovia did kiss Issei. All I can think of for Xenovia getting Issei Secluded was about half way through S2 during the obligatory pool episode, and towards the…. beginning(?) of S3 I may be thinking of half way through S3 when she got him in the... shed?
It was in episode 7 of season 3.