They're clearly both looking forward to this, and when Ochako finally meets up with him when she's ready, he pushes off the wall and instantly goes to head out the door, looking over his shoulder only when she speaks up.

"Yeah, and you're gonna fucking need it when I'm through with you."

He grins, all teeth, and strides out the door without another word and not stopping for her to catch up. Keep on your toes, Uraraka, he's not going to baby you because you're his friend. Even so, the walk isn't long at all - they're still in the residential area of Somnius proper, and finding an empty mansion is equally easy to do. Probably less than forty minutes have passed before he's pushing open a large, heavy oaken door to a castle's empty ballroom. Musty, but this'll work perfectly.