Perhaps everyone has had a beautiful but fragile dream in their youth. The dream of youth will eventually wake up, and it will eventually have to leave and move forward. But he was like a stubborn child, stubbornly unwilling to let go. His love is beautiful yet desperate, and he will try to hold on to even the smallest trace she leaves for him. Even if one thought becomes an obsession, his obsession becomes blurred in the passing years. Is it the past that makes him want to spend his whole life, or is it just her?