Tamago no Kimi.

Aimi lives on Salami, a planet nearly identical to Earth, with one major difference: its inhabitants have a distinct sense of beauty. Considered beautiful by Earth standards, Aimi is seen as unattractive on Salami. She resides with her stepmother and stepsisters. By chance, she discovers Earth and meets Kyou Naruse, described as self-centered or a narcissist. The story draws comparisons to Cinderella, though Aimi’s perception of beauty also differs from that of Salami.