Unaired episode 13 included on the Blu-ray/DVD volume of the Recorder to Randoseru Mi☆ series.

Unaired episodes bundled with the special edition of volume 4 of the original manga.

Masayuki Mizutani is looking forward to some time to himself when his parents leave on an extended business trip. Instead, he arrives home to see one of his schoolmates, Sayaka Shimizu, greeting him at the door in barely more than an apron! Sayaka is a family friend who was asked by Masayuki's parents to look after him while they were away, and to accomplish this mission, she has fully dedicated herself—mind, body, and soul. But when other young girls try to approach Masayuki and his newfound freedom, Sayaka vows to do whatever it takes to keep him all to herself.

In the future, an organization called the GGP has taken control of the world. Rin Ogata was a promising up-and-coming ballet dancer, but suffered a serious injury while dancing and decided to quit. Years later in college, she comes across a club building and soon finds herself intrigued by a transforming motorcycle-like robotic vehicle called a Rideback. She soon finds that her unique ballet skills with balance and finesse make her a born natural on a Rideback. However, those same skills also get her into serious trouble with the government. (Source: Wikipedia)