{Living room, Number 4, Privet Drive}
"Let me introduce you to Miss Granger, Mr. Potter. She will be going to Hogwarts with you." Prof. McGonagall introduced me to Hermione. The brown-eyed brunette gave me a small smile, extended her hand, and introduced herself with an excited expression. "Hello, I'm Hermione, Hermione Granger, pleased to meet you."
...
[Hermione Granger]
[10]
...
'10 again, so it's not something like level or anything, what could it mean?'
"Hello, Hermione, I'm Harry Potter," I replied as I grasped her soft hand and gave it a firm shake. I noticed that she didn't immediately recognize my name, so she really hadn't been to the wizarding world yet.
'What weird dream am I in?' I thought as I turned to Prof. McGonagall.
"Right, we are already behind schedule, so if you would please follow us, Mr. Potter. We need to acquire your school supplies." She said, motioning toward the door. I was about to nod, but then I looked down at my clothes, I was still wearing the PJs that Harry had worn to bed.
"Can you give me five minutes to change, Professor?" I asked.
Prof. McGonagall also noticed my less-than-ideal state and nodded as I avoided Hermione's eyes and swiftly ran upstairs. While changing into more flattering attire was one of my goals, the other was finally taking a look at the glowing book that nobody seemed to fucking notice.
I closed my door and went straight for my nightstand. On it sat a black book that glowed golden, with shimmering glitter erupting every now and then.
'It's practically screaming pick me up.' I thought as I grabbed the leather diary. As soon as my hand touched it, the black book burst into light particles, an effect very familiar in video games, and vanished into my chest.
'Okay... what the fuck was that?' I thought as a glowing blue screen appeared in front of me.
...
[Uploading additional module #@!#@!]
[Unlocking Lust System]
[You can now summon the corruption diary at will]
...
'Lust System?' I thought and tried to follow the instructions. A black book appeared in my hand, and I almost fumbled it, surprised by its sudden appearance. I looked back to see no one there, then opened the black book.
...
[Greetings, user, to the corruption diary. All witches that meet the requirement of extractable traits and have met the user are listed below.]
[Each witch has a corruption rating from Level 0 to Level 5. Increasing a witch's corruption by each level grants the user one of their traits.]
[To increase a witch's corruption, increase their affection to the next level and entice the witch to perform lewd actions, either with your own charm and affection or with the help of Potions provided in the corruption shop to lower their inhibitions.]
[Each intimate action with a witch generates LP, which can then be used in the corruption shop to lower the inhibitions of a witch or increase their affection.]
...
'...'
I stared at each line, lost in thought. From my understanding, this corruption system was the key that would allow me to survive a straight-up fight against Voldemort, because no way in hell am I leaving it all up to fate.
'...wait a second. According to the prophecy...but he will have power the Dark Lord knows not.... Harry Potter is supposed to have a power that the dark lord does not know about.' I thought, connecting the dots, but still this felt a little incredulous to him. Surely this was not what Rowling meant.
'Anyway, no need to think about that.' I shook myself away and turned the page in the book, and sure enough, the first page was occupied by a moving picture of Professor McGonagall, along with some stats and the trait I could gain if I could corrupt her to the next stage.
...
[Professor McGonagall]
[Corruption Level: 0/5 {Strict Professor}]
[Affection Meter: 30/100]
[Inhibition Level: 10/10]
[Inhibition Meter: 0/100]
[Trait unlocked at Level 1: Calm Mind]
[Calm Mind(Blue): A supplementary trait that increases the success chance of a spell by 30%]
[Trait unlocked at Level 2: Locked]
[Trait unlocked at Level 3: Locked]
[Trait unlocked at Level 4: Locked]
[Trait unlocked at Level 5: Locked]
...
The page was set as described in the introduction section, with various stats that I just glanced at for now. My focus, though, was on the trait that I could unlock if I could get Professor McGonagall to corruption level 1.
'Calm mind, it doesn't seem like much, but then again this is not a children's book anymore. Who knows if there are conditions when spells can fail to be cast, so any trait that would increase my chance of casting spells would be pretty important.' I thought, and after reading through the stats once, turned the page to everyone's favorite brunette.
...
[Hermione Granger]
[Corruption Level: 0/5 {Model Student}]
[Affection Meter: 1/100]
[Inhibition Level: 10/10]
[Inhibition Meter: 0/100]
[Trait unlocked at Level 1: Fast Reading]
[Fast Reading(Blue): A supplementary trait that increases the speed of your reading and understanding of text by 30%]
[Trait unlocked at Level 2: Locked]
[Trait unlocked at Level 3: Locked]
[Trait unlocked at Level 4: Locked]
[Trait unlocked at Level 5: Locked]
...
'Okay, so level 1 traits are not going to be overpowering, but gaining them early would compound over time. I can also see what this 10 is all about. I think it corresponds with their inhibition level if I were to guess, though why it would be helpful to me was anyone's guess.' I thought as I turned the page once again, and as expected, it was blank.
I pondered for a moment as I willed the diary away, and it vanished into thin air. Done with the mystery, I stepped toward my closet and frowned. Not one piece of clothing seemed reasonable. Either it had patches sewn into it, or the ones that looked okay were too large for my current frame.
'Okay... I need to go shopping after visiting the vault.'
AN: A basic understanding of the system: fuck girls, gain LP, corrupt more girls, and then grow the number of booty calls you can do while trying to stack as many traits as possible to grow powerful.