If a person's good point is something like an umeboshi (pickled plum) on an onigiri (rice ball)... Then the umeboshi must be on his back. In this world, there are umeboshis with so many different shapes... and with so many different colours and tastes, on everyone's back. But they can't see their own delicious umeboshi, because it's on their back. 

"I have nothing," says an Onigiri. "I only have white rice." 

But that's not true. Everyone has a umeboshi on their back. The reason why people envy others is probably because you can see it better when the umeboshi is on other's back... 

Someone might be envious of you right now. Someone might be admiring something that you yourself have not realised yet. When I think about that, the thought makes me... it makes me want to try a little bit harder. 

~ Honda Tohru, Fruits Basket Episode 7