Whips and Wands

"Um, Riddle?" "Yes?..." "Why did you summon a half naked man that looks like he came out of a sex dungeon?" "I didn't!" "...Well, he's here now. Better make the most of him." Where Harry is taken back nearly sixty years and meets the bane of his childhood existence. It can't be that easy, right? Warning: Small scenes of BDSM, attempt rape, and Dark!Harry. HPxTR