Tsukasa scratched his nose, trying to keep himself focused on his paper work. He was alone at his office, late at night. He'd already taken off his tie and was wearing a plain white shirt with the first few buttons unbuttoned, planning to finally go home after finishing with all the documents he had to check.

The only noises heard in his office were the scribbling of his pen, the tickling of the clock marking past 1am and some noise from the traffic outside. That was until a rather hard knock on his door made him lose concentration. He wondered who the hell it could be at this hour, normally there wasn't anyone around past midnight.

"Come in."