Ikeda Mitsuko is a successful business woman, who made a wish to Santa to have a wife. And here it fits the phrase "Be careful what you wish for..."
A series of inter-related short stories including:
1-4. Kuroyome
5-6. Metoraba
7. Mitsuko-san's Agony
8. Fuji-sensei's Lie

A two-part short story from Kuroyome.

Chiyoko is a 4th grader who loves chocolate! Along with her mother and father (who run a patisserie), the daughter of a japanese sweets shop who sees Chiyoko as her rival, Azuki-chan, and Azuki’s mature little sister Kanoko-chan, she lives everyday happily with a bit of silliness.
(Source: SCX-Scans)

Two girls play a video game on gliders in a virtual world.

The gambling father racked up a huge debt and disappeared. The mother has passed away. The sisters, Kyo and Asu, are the main characters. The two of them are all alone in this world and are very poor; they live in a 40-year-old apartment (no bath, one room plus kitchen, 26000 yen rent). With dreams, hope, and economizing, they live in harmony. Indeed, today as well as tomorrow.

Notes:
? Their names mean "today" and "tommorrow" respectively.
? 26000 yen is about 220 dollars.