Ren Amamiya

Yusuke should have been paying attention. He had gone for night walks around Tatsumi Port Island every now and then to think and ruminate, but he would always leave before the supposed Dark Hour.
But he wasn't paying attention. Not this time. He got distracted and took a different path from his regular commute. Perhaps it was to get a new idea in his head. Perhaps it was to find a new resturaunt he could dine at on the rare chance he had money. Not even he could really tell.
Somehow, his walk resulted in him arriving at the open gates of Gekkoukan High just as the clock hit midnight.
Of course, the building in front of him spreading, shifting, and spreading up into the heavens, along with all other signs of the Dark Hour, didn't go unnoticed. He stopped, shocked at the marvel in front of him. This building, so avant garde in design, laid before him, standing as a beacon to the macabre moment in time he found himself stood in.
He should have turned and walked away. That would have been the safe thing to do. But this was Yusuke. He was drawn to such facinating things. So like a moth to a flame, he stepped within, and found himself within the lobby of Tartarus. He could have taken the teleporter to the top, or headed up the stairs into the building proper... But he wasn't that much of a fool. Given now that his Phantom Thief attire had flared to life around him, he was on alert. He wasn't going any further.
Not unless anyone else showed up.