The fourth of the four Starry Sky games starring the characters from the drama CD's of the same name. Starry Sky takes place at Seigatsu Gakuen, a school which specializes in horoscopes, astronomy and other related topics. The main characters are all based on horoscopes. Starry Sky Winter features Kazuki Shiranui (Aries), Hayato Aozora (Virgo) and Tsubasa Amaha (Aquarius).