The protagonist finds out at the beginning, that due to a congenital disposition, he will soon turn blind. And who would not be hit hard and collapse by such a cruel fate? The hero of the story locks himself into his room and refuses to leave it. After all, why would anything be interesting, why should one look forward to anything? Up to the point, when he is visited by a beautiful girl named Cindy, who invites him to one last time dream with his eyes open and walk in the world "out there".

[Translated from The Official site]