Responses
He's the first person that came to mind the moment haesoo said that.
Could also have another meaning. Like he remembered because the first time they left the house, he was atleast 6 so he definitely remembers such a life altering experience. Could also explain possible neglect
I was thinking this as well. I think it may be that they were finally let outside when they were older
It reminds me to Ray from the anime The Promised Neverland. He remembered everything since day 1 too