This mansion was the place Seojun and Seojin had grown up in while they stayed in Italy, just before they went to college and started living their lives.
It was the place their mother had taken them to after forcing them away from Korea, away from Dongwoo.
This was the place they hated more than anywhere. Why? Because it felt like a cage that kept them locked away from the place they really wanted to be.
It was a restriction, put in place to chain them down.
They wanted to go back to him, they wanted to go meet Dongwoo. They wanted to live with him or at least see him every day, but it was impossible because they were so far away.
But in this mansion that they hated more than anything, they had to find a place where they could at least breathe and live like they used to.
A place that reminded them of Dongwoo and was filled with the scent of nature.
It was a greenhouse, just like the one Dongwoo had found them in.