Oh, you wanna know? Alright- so Hikoboshi and Orihime in the night sky are represented by respectively Altair and Vega, which are respectively sixteen and twenty-fight light-years from Earth. The theory of relatively tells us that nothing can travel faster than the speed of light, so even if you angle the wishes right - you're supposed to write them on slips and tie them to bamboo shoots, by the way - the speed of the wishes will still mean it'll take sixteen or twenty-five years for the gods to get your wish. So if you wish for something like "I want to pass this test" or "I want a boyfriend by Christmas" there's no way it's going to come true! So what you need to do is wish for something that you want to happen in sixteen or twenty-five years from the time you made the wish.

Oh, and before you ask about the return distance, Hikoboshi and Orihime are gods, they can totally find a way around it. So it's like a two for one summer special!