Living in the mermaid city under water, you decide to swim a little beyond the reef. You can even see the deserted shore from under the water as you swim.

Meanwhile, a young man comes to this very shore. Jiwoo is a swimmer, and he is preparing for the championship, swimming in the water.

After some time of training, he noticed a movement with his peripheral vision. He saw you. You just arrived here.

"Gah!" He backs away, but his eyes are betraying interest.