1	1999.07.07	Sae to, Mahou Club to, Sakura no Ki
2	1999.07.14	Nanaka to, Cake to, Kiken na Yoru
3	1999.07.21	Aburatsubo-senpai to, Asagao to, Oyako mendan
4	1999.07.28	Sae to, Furoba to, Tobira no Mukou
5	1999.08.04	Akane, the Hiccups, a Strage Relationshio
6	1999.08.18	Takakura-sempai, Origami, Secret Date
7	1999.08.25	Sae, a Tomato, Dance of the Paintbrush
8	1999.09.01	Alice, Railroad Tracks, Sauce Senbei
9	1999.09.08	Kimonos, Short Skirts, Age of Joy
10	1999.09.15	Snow, the Colt, First Kiss
11	1999.??.??	Akane-chan, Mirror, End of Year Sale
12	1999.??.??	The Kite, the Whirlwind, and Miki
13	1999.??.??	Sae's Magic, Sae's Feelings, Forever

It's important to note that Sae starts every episode writing a letter to "Mickey" telling him what happened that day. It's not explained who Mickey is, other than he is a powerful magician. In the OP, you see Sae getting a letter from a mailbox. This is assumedly a letter from him.