He wasn't facing an enemy, but his own boss, a mysterious high-level employee within the company.
Even now, after having communicated by letter for a considerable length of time, Colin still found the other to be shrouded in mystery.
However, compared to when he was a newcomer, upon seeing the door again, he had become an old hand at the company, no longer naive and confused, nor harboring as much fear...
"Sigh."
He took a deep breath, waved his hand, and flames surged around him, enveloping his body.
Then, he stepped forward with his legs, walking toward the great door.
At the same time, he pondered some things...
'Come to think of it, this door appeared both times after I returned from the "Arrival" project. Is it because it couldn't reach Earth?'
'Or, according to some of what the "Lady of Thorns" said, is "Lady Rabbit" also not within a certain "wall"?'
As these thoughts flickered through his mind, Colin's figure passed through the door and entered.