Honoka Miki is used to living in the shadows. At eighteen, she is clumsy, ordinary, and constantly compared to her perfect older sister, Hana, the girl everyone admires. Beautiful. Smart. Talented. Everything Honoka is not. But despite their differences, Hana has always been Honoka’s best friend… her safe place. Until one day, everything changes. Honoka is suddenly forced into a marriage she never asked for, with her sister’s fiancé. She didn't steal him. She didn't love him. And he definitely doesn't love her. So why are they married? The answer lies with Hana. Marriage is supposed to be a journey two people take together—until death separates them. But what happens when two strangers are forced into it? Will love grow between them… Or will this marriage destroy everything they once had?