Yosuga no Sora

Yosuga no Sora: In Solitude Where We Are Least Alone is an anime TV Series set in the Anime Cinematic Universe.

Season One
Sora Kasugano and Haruka Kasugano are fraternal twins, each growing up with a secret they never dared share with another soul.

Once a privileged little girl, Sora Kasugano fell ill and was hospitalized for most of her childhood unable to be with her sibling. Now in her mid teens, an unexpected encounter with her twin brother sparks a life-changing event.

Young Haruka Kusagano wanted nothing more than to prove he was fearless. But when everything he held close was taken away, life taught Haruka to be afraid. Now older and more sheltered, Haruka closes himself off. But when he meets his estranged twin sister Sora his life changes forever.