Yeah he left the apartment.
but then, I don't understand the point of that story...
Based on my understanding the ghost that was in apartment 704 shifted to 703 as 704 which was previously empty has a new tenant now and 703 is currently empty with the guy leaving and his sisters on vacation. The focus on two opposite apartment at the end of the story, esp the panel with big 703 might be a projection of the ghost shifting and ready to haunt the new tenant on the opposite room no.
Can someone explain the ending of the apartment story? Did he just abandon the apartment?