The space was large enough, definitely more than enough for a photo wall.
But they couldn't make too much noise. First of all, they wouldn't use a power drill to make those really sturdy photo walls, so this time they chose the sticky kind, the non-marking kind.
After all, this was Bae Juhyun's house; they had to ensure the overall integrity of the walls as much as possible.
When Bae Juhyun was decorating this house, she spent quite a bit of money!
Secondly, if they used a power drill, the noise would be too loud and might disturb others, who might directly call the police.
They didn't want to become famous that way.
Lastly...
What if—what if one day in the future these two really became strangers? It would be easier for Bae Juhyun to clean up...
They always had to consider all sorts of possibilities, it wasn't necessarily going to happen.
More so, they were just preventing potential problems.