Unlocking the Iron Maiden? (Integra X Alucard fanfiction)

Shall we dance?

(Sorry it's been so long! Enjoy!)
I laughed. "Well. I am glad you slept well." Alucard smiled at me and rose his head.
"Yes... I am as well." He spoke with a gruff, sleepy voice. Dazedly, he stood up and looked a bit dizzy for a while. I followed him quickly because I feared he might fall. However, he caught himself before smiling at me and regaining his balance. He looked out the window for a long while, then he grinned like he had a brilliant idea. I furrowed my brow at him. What was he up to? "Alucard? What's that grin about?" I asked with a laugh and I nudged him lightly. He turned to face me before grabbing my hand. I was surprised. He grinned wider. "Come on, it'll be fun." I followed him into the living room where he grabbed a handful of records and picked up the record player. He then pulled me into the ballroom, which I hadn't set foot in since I was a child. He smiled. "Wait here." He told me before he began cleaning the place like a mad man. It looked beautiful again, that was for sure, but I still didn't know why he was doing it.
"Alucard, what are you doing?" I asked him while crossing my arms. What would we need this ballroom for? He laughed. "You haven't figured it out yet? What are ballrooms usually used for? Don't you know?" He laughed again and shook his head. I thought for a while but I could still only think of one thing. Which, of course, was dancing. But that couldn't be it? Could it? When he was finished, he set the record player on one of the end tables and put a record in it. He did not start the track though, he approached me instead. "I'm going to go change into more suitable attire. Perhaps you'd like to as well?" He spoke with a smile again while passing me. I was still confused.
"Alucard, what is this about? What are we doing here?" I asked again. He sighed. "What's wrong, Sir Integra, do you not want to dance?" He asked before disappearing down the stairs to his lair. I stood there blinking for a while before actually leaving to change into a ball gown. I took a while to decide and was somewhat embarrassed to wear one. But, I eventually dressed and descended the stairs back to the ballroom. He was there waiting in a suit, smiling.