A spin-off based on the short story "An Invitation from Thanatos" with a unique take on how the two came to be. Was their meeting and ending pure coincidence? Or was there more than meets the eyes?

Solus. The link which ties people's souls together. Sharing both sensations and emotions, the discovery of this groundbreaking factor will throw the world into chaos. Or it should have. With most people treating it as a fantasy pairing, people's lives went on as usual albeit a few. Hikaru Izuy...