World's End Blue Bird, Volume 1 (manga)

After a meteor hits Earth, Tokyo is saved by a powerful sorcerer. Years later, the city ends up split between the haves and have-nots — with the sorcerer's descendants ruling over them all. Ray, a handyman from the slums, will take on any job for the right price.

One day, he meets Guang, an extraordinarily pretty, secretive, and arrogant man from upper society. After spending a night together, Ray finds himself protecting Guang, which may cause him more trouble than the money is worth... WORLD'S END BLUE BIRD is a fantastical, magical love story about overcoming fate in a painful and impossible world.