In a world where Makashima wasn't caught by Kougami and Akane, he takes what he likes, when he likes and however he likes, as long as it makes Kougami suffer in some way. So when he notices Kougami looking at the new detective Akane differently...

What if your whole life rested on a song choice? If the right song was the difference between life or death? Would you take the easy option and flee at the first chance you get? Or would you fight for your right to live? Melodía is a young siren hybrid, who has never left her families island. Until, on her eighteenth birthday when she gets a visit from the Gods and Goddesses themselves. Before Melodía can even comprehend it, she is dragged into a world where the right choice means everything. Where life or death is just around the corner. At a time when she really needs to keep focused on the task at hand. But new adventures get in the way, along with the mysterious Dimitrios; who turns up along with new mysteries that need to be solved. With a brand new world she’s never seen before and so many decisions to be made, will she make it through the challenge of the muses.