Air, Yosuga no Sora: In Solitude, Where We Are Least Alone. Recommendations
-Both animes's setting/story goes by an omnibus format, and have small arcs for each heroine that doesn't diverge from the central plot of the story (with the setting intact)
Although these anime are completely different in matters of ecchi, they are both talk about tragic love stories and star-crossed lovers with a certain shade of eastern philosophy and magical realism, with the only difference that in the AIR drama is based on an incurable fatal disease, and in Yosuga no Sora it is an unacceptable incest. Besides, both animes are also based on very famous visual novels.
YNS: ISWWALA has an air much more pungent than the one in Air, and I couldn't handle it so I dropped Sora. Don't tell *****. Both play us like a viola, with their stories warming our cold hearts, and I only say this to sound as if I watched Sky of Connection for the plot. Skies have air.