[When he knocks Mettaton takes a second to respond. It's difficult to make himself speak, to not stay silent and let Asriel move on so he can continue to weep in peace. But he knows that won't help him in the end, really.]
Yes, I'm in here. Come in.
[He stays sitting on the floor, facing the window silently as he waits for Asriel to enter.]
action
Yes, I'm in here. Come in.
[He stays sitting on the floor, facing the window silently as he waits for Asriel to enter.]