Himitsu (Kuro No Chikai)

Kagamine Rin's 'Himitsu (Kuro No Chikai)' is a hauntingly beautiful song that delves into themes of forbidden love, sacrifice, and the consequences of breaking divine laws. The lyrics tell the story of a fallen angel who, after losing its wings, becomes entangled in a forbidden love with a human. This love is so powerful that it leads the angel to forsake its purity and embrace a dark, corrupted existence.

The song begins with the fallen angel meeting a girl with beautiful eyes, and they instantly fall in love. However, this love is forbidden, and the angel opens a 'forbidden box,' symbolizing the breaking of divine rules. The angel's desire to be with the girl leads to a series of tragic events, including the angel abandoning its pure heart and even its wings to embrace a demonic existence. This transformation is a metaphor for the lengths one might go to for love, even if it means losing oneself entirely.

As the story progresses, the girl also falls in love with a mysterious boy, leading her to betray everything she once held dear. The lyrics describe their love as a 'forbidden fruit,' a biblical reference to the original sin, emphasizing the gravity of their actions. The song reaches its climax with the fallen angel sacrificing its life to save the girl, leaving behind only a single feather. This act of ultimate sacrifice underscores the tragic nature of their love, which, despite its intensity, is doomed from the start. The song concludes with the notion that they will meet again when the 'fruit of sin' has withered, suggesting a cyclical nature of their love and punishment.

'Himitsu (Kuro No Chikai)' is a poignant exploration of the complexities of love, the sacrifices it demands, and the inevitable consequences of defying divine laws. The song's rich metaphors and emotional depth make it a compelling narrative that resonates with themes of love, loss, and redemption.