It is a bit different though, to give this one some credit. So the premises are similar but not exactly the same
its rly not, theres many differences. for one, rokuto and nanami aren't actually childhood friends -- those are just fake memories the creature "rokuto" has. there was no original rokuto, unlike hikaru. and anyway, its not like that mangaka came up with the concept of non-humans mimicking humans.
Yeah
Learn to read holy shit
Learn to read the whole thread where I agree with the other person who corrected me (￣∇￣")＝凸
Isn't this basically the premise of Hikaru ga Shinda Natsu :/