Your a secret weapon that is hidden from the world one day you escape and run into a group of people who help you even if your 19 you act like a child and one person takes an interest in you

After Narcissa flees from her wedding, leaving only a note, her younger sister Y/n is left to mend the fallout for their family's reputation. In the wake of Narcissa's dramatic escape, Y/n finds herself in a problematic position- she is obligated to marry Lucius Malfoy instead of her sister, taking on a role she never wanted and stepping into a situation fraught with challenges and expectations.

After Sirius breaks your heart you and regulus get closer