Yuri meets a mysterious girl named Luna by the seaside. They talk, laugh, and share a peaceful moment together. But just as everything feels real, Yuri wakes up—only to realize it was all a dream. Later, despite not wanting to, Yuri returns to school. There, he sees someone he never expected to see again… Luna. The same girl from his dream. Confused and curious, Yuri begins to wonder… Was it really just a dream?