The story takes place in a common town. Your parents disappeared long time ago leaving you and your half sister. You go blind after a car accident because of your little sister. Doc says some day after some special event (hint) you will regain your sight, maybe. So there you live your miserable life not being able to see all the cute girls around you. Until you regain your sight, you predict the appereance of the girls they have now with your memories.

[slightly edited from AnimeDensetsu]