Himitsu – Kuro no Chikai

Himitsu – Kuro no Chikai, also known as Alluring Secret - Black Vow or 秘蜜 黒の誓い, is a captivating light novel based on the popular Vocaloid song. The story follows Rin, a young angel who falls in love with Miku, a human girl, leading to a forbidden romance. In a desperate move to be together, Rin strikes a deal with the devil to be reborn as Len, a human boy. The novel delves into themes of drama, fantasy, gender bender, romance, supernatural elements, and tragedy, offering a compelling narrative that explores the complexities of love and sacrifice in a world where angels and humans navigate taboo relationships.