Stella☆Record summary:

Ritsu and Kyouko have confided their feelings and decided to go out with each other. Ritsu is in love with Kyouko, and she is not lying about her feelings, but she seems to be worried about something...?Shioya Teruko wrote a **oneshot** before starting this serialization, it's a **prequel** to this story and explains a few things. It's called "My True Feelings".