Ionia and Prince Gravis of Fanoren shouldn't have met, but because they did, a firm friendship formed, one that would transcend even death. Becoming best friends as children and later something more, the two young men came of age during a perilous time in Fanoren's history, eventually leading to Ionia's death on the battlefield. Heartbroken, Gravis went on living, but without a piece of his heart. But the day after Ionia's death, Leorino was born, the youngest son of a noble family. Leorino somehow inherited both Ionia's eyes and his memories – and with those memories, both his love for Gravis and knowledge of the events that led to his own death. Eighteen years later, the wheels of fate begin to turn…

Note: The spin-off is one volume and the protagonist is Joseph/Josef, Leorino childhood friend. The novel take place during the main story in Josef perspective and after it.