I brought the slowest couple in the universe together and finally got them engaged, but they called the engagement off on the day of the ceremony itself! I was reborn as the male lead's younger sister in a fantasy romance novel. But the female lead's older brother, Aiberg Rafaello, has a severe sister complex and would not let go of his sister. So, how do I make him stop obsessing over his sister? Find him a love interest. "What kind of person do you like, your grace?" "I like someone with blazing-red hair and eyes like the flame, a lady who never stands down for anybody. Speaking of which... I'd say you match the description." I was only trying to save the lead characters' engagement. How did I end up flirting with the female lead's brother?

Original Novel

Original Webtoon:
Naver Series, KakaoPage, Ridibooks, Comico, BookCube, Peanutoon, MrBlue

Official Translations:
Japanese

In a romance novel full of shoveling and misunderstanding, she possessed Namjoo's younger sister. Fallen in the novel, I took off my feet for the frustrating main couple, but on the day of their engagement , the main characters declared their breakup! And at the center of it was the heroine's older brother, 'Aiberg Raphael'. The monster duke, aiberg was quite a 'siscon'... … . In order to get rid of 'Siscon', wouldn't it be reasonable to just do it? “What is the Duke’s ideal type?” “A woman with red hair and eyes resembling blazing fire, and who will not be discouraged by whoever stands before me. Ah, when I say this... … You look like my ideal type.” I was just trying to prevent the breakup of the main characters, but did I cheat on the female protagonist's brother without knowing it?