Okusama wa Mahou Shoujo EP6 - The Charms of Adults Are, You See

The manager of Ureshiko's boarding house injures her back while she exercising with a friend. She gives Tatsumi and Ureshiko two tickets to a mambo concert, along with her unofficial blessing of them as a couple. Ureshiko becomes excited at the thought of going on a date and even goes to tell her friends about it, but her happiness is soon dashed when Tatsumi does not show up at the concert at the appointed time.

As it turns out, Tatsumi encounters the older version of Sayaka while on the way to an interview. Tatsumi invites her along, and the two learn about the aging process of ceramic pottery. In the end, Sayaka uses too much of her power to keep herself in her adult form, and Ureshiko has to give up some of her power to keep the spell from breaking in front of Tatsumi. Tatsumi rushes to the concert hall, only to find that the event has already started. Ureshiko arrives as well, and the two dance the mambo together outside of the building.