My friend's younger sibling isn't a girl, or so they say?

My fiancé ran away. And he did it just three days after we got engaged. After rolling here and there and barely managing to track him down, what? He was planning to get engaged to someone else? “Why was that person okay, but I wasn't? Do you even love them?” “What? Don't talk nonsense.” “Then why?” When Olivia demanded an answer, Aiden replied like this: “Because... you're my friend's younger sister.” Of course, that was a blatant load of bullshit. *** Olivia broke off her engagement with Aiden. Now, she planned to shake everything off and live a life of her own. However— “I think that day will be a bit difficult, Senior. I have a date.” “...What? A date? Who the hell is that gu...