From unexpected encounters at a cafe, to ringing in the new year, to difficulties at school, the everyday lives of Tooru, Run, Yuuko, and Nagi are never dull.
A small set of OVAs with the same variety of content found in the parent series. It would be a good idea to watch that first, both for the character introductions and because this references a few events there.
More Information:
aniDB
Wikipedia