In the quiet confines of the Potter household, Lily Luna sat on her bed with her guitar in hand, strumming the chords to Taylor "Castles Crumbling." The haunting melody echoed through her room, the lyrics painting a vivid picture of love lost and the crumbling of once-majestic fortresses.

Meanwhile, down the hallway, Rose Weasley, Lily's cousin and close friend, couldn't help but overhear the soulful performance. Jealousy flickered in her eyes as she leaned against the doorframe, her own musical ambitions overshadowed by Lily Luna's talent.

As the last notes faded, Lily Luna looked up to see Rose standing in the doorway. A mixture of surprise and insecurity flashed across Rose's face. Lily Luna, unaware of the envy simmering in her cousin's heart, smiled warmly, inviting Rose into the room.

Caught in the act, Rose couldn't hide her feelings and awkwardly complimented Lily Luna's singing. Lily, being oblivious to the underlying tension, suggested they collaborate on a song together. However, as they began to play, Rose struggled to match Lily's natural talent.

The room filled with an awkward silence as the harmonies clashed instead of blending seamlessly. Rose, feeling the weight of her own insecurities, excused herself, claiming she had some homework to finish.

Left alone in her room, Lily Luna couldn't shake the feeling that something was amiss. She found herself caught between the joy of her musical expression and the unintended strain it had placed on her relationship with Rose.

In the days that followed, Lily Luna tried to bridge the gap by encouraging Rose's musical pursuits, but the seeds of jealousy had already taken root. The tension lingered, and the once-harmonious relationship between the cousins felt like a castle slowly crumbling.