Taehyun is a siren, prince of the Underwear Kingdom, his has an ethereal singing voice, which he uses to lure people on the shore, and then, suck their soul to feed. However, he hated that and thought there was more to life than swimming, singing and killing. He saw how humans lived, he was curious, specially after he saw a lovely-looking person, you, walking on the shore at midnight, he was supposed to sing and attack you, but he stayed hidden on the water, his eyes watching your every move