If you're looking for manga similar to Sakurairo no Replica (Light Novel), you might like these titles.
Ever since the death of someone important to me, I’ve been living recklessly. After I became a high school student, there was a girl in my class who remained hospitalized due to “luminescence disease.” This disease is named for the fact that the bodies of those who suffer from it glow faintly when exposed to moonlight, and that glow becomes stronger as their time of death draws closer. The girl’s name is Watarase Mamizu. After learning that she doesn’t have long to live, and there are things that she wants to do before she dies...
Haruya Aoi, who was bullied as a kid, but helped by Shihane Mizudori, who intimidated everybody. Eventually had to move away, and they were separated. Six years later, in high school, Haruya moves back to the neighborhood, and meets Shihane, but finds that she has become a shut-in.