Chrysanthemum

How far will you go for the one you love? The thing that Kiku most remembers about his grandfather, Haga Yuuhi, is his figure when he looks at the twilight. Every time he was asked, his beloved grandfather always changed the subject. Since childhood, Kiku has always wondered ... about his grandfather's past in a land that is on the horizon ... about his grandfather's obsession with Chrysanthemum flowers ... Chrysanthemum is a story about compassion, waiting, and about forgiveness.

(Source: MangaUpdates)