Board Thread:Questions and Answers/@comment-68.4.127.67-20130309002249/@comment-62.167.29.43-20130313071832

As Psychicken said, it's not sure from what Timeline You comes.

Izayoi seems to come from the modern times as he's wearing (what it seems) Wireless Headphones XD also he pretty much knows stuff from the modern times too.

Asuka stated that she comes from another timeline as she hardly knows anything about Halloween or something (i think that was what she said in the Anime when she walked thru the town with Izayoi).