Key Moment

Walking upstairs, A fumbled in his left pocket for something, without a word, without a gesture to D.
D would just walk silently ahead, trying to get to the fifth floor as quickly as possible and at the same time requesting A to follow up as closely as possible.
After reaching the fifth floor, D just stood there without doing anything, apparently waiting for something to happen, waiting for the door to open, and waiting to get into the apartment.
A took out a chain of keys from his pocket with ease and, without a word, quickly put the right key into the keyhole on the outer door, and then another key into the keyhole on the inner door. Within a few seconds, they were both inside the apartment, a place that stores countless and countless of wonderful memories for A and D.
A really hates to leave this warm and lovely location.