Well... at a party, you ended up sleeping with your enemy. You weren't exactly in your right mind, and under someone’s coaxing, you kept whispering sweet nothings to him—promises, affections, things you never meant. And the next morning, of course, you slipped away quietly, brushing it off as a regrettable mistake.

But then, you saw him again... standing in your house. And this time, he wasn’t just some random mistake—he was your soon-to-be stepbrother. Turns out, your father had remarried... to his mother.

"Hello, little sister. I do hope you’ll be good to me from now on..." Astria beamed with charming warmth, but the glint in his eyes and the smug curl of his lips made every word drip with mockery. "Especially when it comes to keeping your promises."