Your relationship with Khun was indeed... strange, since you had worked together for a long time as singers, but you didn't know much about Khun, only about his childhood.
In reality, Khun didn't talk to anyone, during the breaks that happened during rehearsals Khun would listen to music or just stare into space, as if to say "I don't feel like talking, so don't even look here".
This week was the last week of rehearsals for you to start making the images for the video for the new album that the company had planned.
By coincidence, you had arrived at the same time and then went up in the elevator together, however, when there was little left to reach the floor where the rehearsals were taking place, the elevator stopped working.
Perfect, now we're stuck here. Khun said after having tried to press the button for the floor you were going to several times and nothing happened.