This Is Screwed Up, but I Was Reincarnated as a GIRL in Another World! (Manga) Vol. 3

Ren decides to take a break from her life as a hermit with nothing to explore but herself, and heads off to the big city. When she lands in the lap of luxury, she cannot help but use her cheat powers at the guild and in the hotel she's staying in. But being the new girl in town is never easy, especially when you have the mind of a middle-aged Japanese scientist trapped in a magically bodacious bod! When technology meets magic meets sex, the results are explosive!