If you're looking for manga similar to Garden Sky, you might like these titles.
The world of Earth, and the world of heaven, are separated by the clouds. Rinne is one of those who lives in heaven. Then a wild fire that no one can put out in heaven, where it never rains, happens. Rinne is determined to put it out, but accidently trips and falls to Earth. The fire is still going strong in heaven, and Rinne has to figure out how to put it out.
There is a place in heaven that is a "new Vienna" where classical musicians gather. The story follows Beethoven, who will meet other musicians like him, like Mozart, Liszt, Ravel, Bach and many more!
The story set in Heaven, except it's a corporation with a hierarchy. There are gods from the major religions, and they're all discussing to wipe out humankind (again) when suddenly! A human girl enters. What will happen? What about the end of the world?
Satoshi-kun, a drifter, arrives in heaven to work at a bookstore as a substitute manager. There he meets Rui, a girl who also temporarily works there. Follow the daily events of these two people as the place they are in (Heaven's Bookstore) help those regain what they lost.
Makoto lives alone until two strange boys from the world of games appear before her! One is a knight, and the other is a wizard. And just like in the game, Makoto becomes the "princess"! In order to save Princess Makoto from the wicked wizard, the cool knight Nanase begins living with her!?
The story revolves around Daichi, a 24-year-old man whose girlfriend has died, and Akari, his girlfriend who is now in heaven. Akari wants Daichi to forget her, but Daichi doesn't want to forget.