K-ON! dj - Oneechan Daisuki!!

After a night of lonely playtime staring at pictures of her sister, Ui awakes with a bit of a cold. Unfortunately for her she has a quiz at school that day. The situation turns advantageous, in many ways, when she gets home and Yui arrives to take care of her. In part two, we get a few more pages of Yui/Ui in the form of a short story about what happens after the first half, though this story is only loosely connected.