The Siren's Soul

Strange events occur for fraternal twin sisters, Day & Night. They find they came from a long line of Sirens, mythical creatures, with half human torso and half fish-tail. These creatures are born with no soul, but it's a mystery why these twins infact were born with souls. As their story goes deeper and deeper, Day finds her self falling in love with a human, as Night is playing with the heart of a demon. The plot becomes more complicated when a unusual fate is brought to everyone's eyes.