The sea after dark brings only endless coldness. You float in the water, pushed by the water, into the unknown darkness. No matter how much you struggle, your hands and feet cannot touch the floating objects; no matter how much you cry for help, no one will hear your cry. When the despair transformed by the pressure of the waves and air has no end in sight, and when the once firm belief gradually becomes blurred in your mind, at this moment, the life-saving straw appears in front of you, which is within reach.