User blog comment:B214/Volume 23 discussion blog/@comment-92.20.248.68-20170425130247/@comment-1359322-20170425152046

In Volume 2, it was mentioned that Asia has been Devil for a month.

In Volume 4, it was stated July. Seeing how Volume 3's event isn't far from Volume 4, Volume 3 should be around Late June or so. So the expected time where Ise became a Devil is around May.