It's been five years since I started living at my husband's family home. The head of this household isn't my husband, but my sister-in-law, Eriko, who's been living here all along. I know... I know that my husband's heart belongs to her, not to me. He worships her in a way that's almost unnatural, seeing her as the only one he can truly rely on, like a helpless infant. But I can't say anything. No matter how strange the situation, this is the only place I have left. Sister-in-law, I actually know everything... Muhahaha.