The younger brother has started looking for someone. He seems to be searching for the woman he gave his virginity to at a masquerade ball. ...Yeah, sorry. That's actually me, the older sister. Of course, I have no intention of coming forward. *This is a step-sibling story. The main story consists of 7 chapters plus extras (quite a few). *Despite the shocking title, it's supposed to be a fairly normal romance novel. *The book version has been published by Futaba-sha's M Novels. *The manga adaptation is scheduled to be released on July 31, 2019. *Although I don't reply to comments, I do read them. Thank you.