From Midnight Scans:

Nana, a 16-year-old girl, has had a happy relationship for 1 year with a University student named Shugo. Though, it all comes to a halt, when a doctor tells her that in 6 months, she will become completely blind. While her condition worsens everyday, she decides not to tell Shugo anything because she fears she will be pitied. Will their love be able to survive this tragedy or will it go all downhill?