If you think of someone's good qualities as the umeboshi in an onigiri it's as if their qualities are stuck to their back! Maybe the reason people get jealous of each other is because they can see so clearly the umeboshi on other people's backs.
Natsuki TakayaRitsu: Please, Onii-san, please write with takoyaki power! Mitsuru: Yes, sensei! With ikyayaki or takoyaki or whatever it takes! Write quickly, without hesitation! Ah... Um... W-what is takoyaki power? Ritsu: Well, that is--! When Shigure-niisan eats takoyaki, he transforms into a great warrior... Shigure: No I don't.
Natsuki Takaya