2-Part Oneshot before it got serialized.

After losing her parents at a young age, Uiko comes to find solace in exchanging letters every Christmas with a picture book author known only by the pseudonym “Kuma-san”.
10 years later, unable to pay her university’s tuition fees and on the brink of having to drop out, she comes in contact with a popular novelist named Fujimiya Hiiro, and now works as his assistant to save up enough money. What does the future have in store for her?