Starry Sky After Winter continues from the events of the previous game, with Tsukiko studying in Seigetsu Academy for the third year. It follows the continuations of the routes from Starry Sky in Winter and there is a new route for Kagurazaka Shiki.

The first 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 Spring features Suzuya Tohzuki (Cancer), Kanata Nanami (Pisces) and Yoh Tomoe (Capricorn). It follows main character Tsukiko Yahisa, who's the first girl to enroll in the school, and her first semester there, which she spends with her childhood friends Suzuya and Kanata along with Yoh, a transfer student who came from France.

The third 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 Autumn features Kotarou Hoshizuki (Libra), Naoshi Haruki (Leo) and Iku Mizushima (Gemini).

The second 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 Summer features Homare Kanakubo (Taurus), Ryuunosuke Miyaji (Scorpio) and Azusa Kinose (Sagittarius).