Sayoko ~ Summer I wish upon a star ~

Koichiro Asahioka (player) confessed to Sayako Maiya (heroine) in the seat next to him who always liked, and became a couple safely.
The first two of the virgin and the virgin will progress little by little the relationship which is going to progress little by little, spending both happiness and self-mind, but Yaritin senior who aims at Sayako appears, gradually become disturbing air It will become.
Will Koichiro and Sayako be able to spend a happy summer vacation with themselves…?