The storyline goes back in time when Koyomi arrives at the Anehara School and meets Misa, who, after a series of unusualevents, agrees to teach her Modern Magic.

Daemons have been released, and Yumiko asks Koyomi to help her vanquish them, unaware that the only magic Koyomi canperform is summoning washbasins.

A trip to the water park turns chaotic. Misa seeks to find the source of the virus that brought the Daemons. The ladies prevent a possible disaster.