Alluring Secret (black Vow)

Kagamine Len's 'Alluring Secret (black Vow)' is a hauntingly beautiful song that delves into themes of forbidden love, sacrifice, and the consequences of defying divine laws. The lyrics tell the story of a fallen angel who, after losing their wings, becomes entangled in a forbidden romance with a human. This love, deemed unacceptable by both heavenly and earthly standards, leads the angel to make drastic decisions, ultimately sacrificing their purity and even their life for the sake of their beloved.

The song begins with the perspective of Rin, a fallen angel who has surrendered to a tainted pact. This angel, wandering through a twilight city, encounters a human with captivating eyes. The moment their eyes meet, the angel falls deeply in love, despite knowing that such feelings are forbidden. The angel's desire to be with the human grows, leading them to open a 'forbidden box,' symbolizing the breaking of divine laws and the pursuit of a love that can never be sanctioned.

As the narrative progresses, Len's perspective is introduced, portraying a human who meets a mysterious boy at a sacred place. This human, too, falls in love at first sight, and their mutual affection leads them to betray everything they once held dear. The song's climax reveals the tragic consequences of their love. The fallen angel, in a final act of sacrifice, gives up their life to save the human, leaving behind only a single feather as a token of their love. The song concludes with a poignant reflection on their eternal bond, suggesting that they will meet again when the 'fruit of sin' has withered away.

'Alluring Secret (black Vow)' is a powerful exploration of love's ability to transcend boundaries and the devastating costs of defying societal and divine norms. The song's rich metaphors and emotional depth make it a compelling narrative about the lengths one will go to for love, even when it leads to their own downfall.