Yes, in her room.

Once they arrived at the building they were staying in, Kazuma turned to Darkness. "I can carry Megumin the rest of the way Darkness."

"Alright Kazuma," she nodded, handing the shortstack over. Kazuma grunted indeed the weight of the surprisingly heavy girl, but kept that remark to himself quite wisely.

"Alright, which one is your room?" he asked her.

"It's one of the upstairs ones," she replied, and he nodded, walking her up the stairs, and going to the door she pointed out. He opened it up, and they headed in, before he laid her on the bed.

"Thanks Kazuma," she remarked.

"No problem," he smirked, before holding his hand before her face, and snapping his fingers. Instantly, she dropped into a trance, her face going blank, her eyes staring vacantly. "Heh, that worked. Although, she might be too tired to do much," he mused.

After a moment of thought, he reached into his clothes, and pulled out the Sex Note. Finding a quill in the room, he proceeded to write, "Whenever Kazuma Sato snaps his fingers to trigger Megumin's trance, if she had worn herself out with explosion magic, she will regain her energy for one hour, before becoming exhausted again, so she can carry out any orders Kazuma gives."

"There we go, problem solved," he remarked, walking back over to Megumin, and musing, "So... What to do with you first?"