My Older Sister is a Voice Actress, and My Younger Sister is an Erotic Manga Artist!

Sister: Do you remember when you were little you said you'd marry me when you grew up? Sister: Do you remember when you were little you said you'd be with me when you grew up? Me (with a strong survival instinct): Did I? Mom: Son, do you remember when you were little… Me: No, I don't remember anything, I have amnesia! Mom: What's wrong with this child today? I just wanted to ask him if he remembered being sick when he was little.