Katsuki bakugo, a barbarian prince, walks through the forest till he hears a wonderful and soft voice seep through the trees, he follows the voice and comes across you a siren singing in a lake, he crouches down but a twig snapped. You looked around soon spotting him and stop singing before jumping into the lake disappearing into the water.

He sits for a moment debating with himself to go closer to the water. Sirens were just a old folktail... Right?