A mysterious girl guards a store called "Wanderer" to provide a spiritual place for people on the road. One day, a strange man broke in, causing ripples in her dusty heart again. In the hospital ward, under the dim light, she told a long story to the part-time students in the store, a past full of pain about youth, friendship, first love. From this past event, the female student understood that youth is fair to everyone, and we all had it. Everyone has it, but no one can keep it. Maybe youth is something to miss. No matter what it gives us, happiness or sadness are the purest and simplest emotions in our lives. Don't blame it and don't stop because of it. If you have it and lose it in the end, you still have to move forward. Maybe there is something you are looking for waiting for you in front of you. Walking out of the hospital, the female student looked up at the sky. It was another beautiful day. I hope all those who have youth will treat it well. Those who are about to lose it should not panic. Those who have already lost it will keep it.