Feeling like a fish out of water after moving to his mother’s sleepy seaside hometown, Yukiya is on his own one day when he hears agonizing moans coming from a secluded cove by the shore. Ignoring locals’ warnings about the so-called murderous monster said to haunt the sea, he goes to investigate and finds a beautiful young man in pain. The man, though unable to speak, seems to have the power to transform into all sorts of animals and sizes and quickly shrinks himself into a boy of Yukiya’s stature. A sweet relationship soon begins to blossom between the two lonely souls, but little does Yukiya know, this beautiful creature is hiding dark, hideous secret…