OVER THE G-LINE (G線上の彼方18+)

Akira, who has been weak since childhood, he loves playing the violin.
Toru Saijo, the private physician who has been helped Akira since he was little.
Akira has a special feeling for Saijo. He used to think he can be with Saijo forever.
However, one day Saijo told him that he is goung to engage to his sister, Mari.
The relationship is coming complicated and the final decision of Saijo can make Akira happy or sad ?