In the dead of the night, I dress as a human. I wore a cap so that my eyes will be concealed. Than I kept my mouth shut to keep my fangs from showing. I maneuvered in the night in remotest places in human territory. I reached my destination in afternoon of next day. I go to my spot. It's hid behind a waterfall. It's a classic hideout. There is high chance that my potions have already been taken away. I enter the cave and I go into the depths. Suddenly I hear muffled sound. I slowly walk towards it. I see a man and a woman on the floor. The man has tied woman to the floor stones. Currently he is fondling girls breast and he starts sucking her breasts. This guy is a C class hunter but he is an old guy. The girl is only around 15 but her breast look very nice. I am aroused. I near him. And with my sword I chop his head off. Blood is on girls breast and face and the body is on side. The girl is terrified. But gradually she starts gaining rational thinking and understands that someone has saved her. I take out the clothes in her mouth. I ask her what's up?
Apparently she was brought here by the man on the pretext that he had found a purity potion for her. She had a good impression of the uncle so she came but he knocked her out and when woke up uncle was sucking her tits. She was terrified she said.
I untie her. Then I search for the potion on the man. I find my potions and also two body strengthening potions. And his gold pouch and my previous gold pouch.
Then I tell her that I am tempted by her beauty and want to sleep with her. She freezes when she hears that. So lit fire on lamps. She sees my face. Seeing that I am young she is less afraid. I tell her that I am a B class hunter. She freezes again. I laugh at her. I near her. She backs way. I go nearer to her. She reaches the wall. She is terrified. I go sit near her. I think she is very beautiful. That must be the reason for the old guy to bring her here. I am very tempted. My goblin instinct kick in. I stare her eye to eye. She lower her eye. She has tears flowing down her cheeks with mans blood. My nose and her nose are touching. She slowly raises her eyes to meet mine. She gazes for a while. Slowly her fear toward me seems to have faded away after looking at me. I lick her cheeks and wipe away all the tears and blood. I wipe her face clean with a handkerchief. I arrange her hair. Again our noses are touching. I tilt my head and I ask her to do the opposite of mine. And our lips touch. I teach her step by step to pleasure me. Tongues are rolling around each other. We kiss for an hour. I am thirsty. I drink water and bring her some. She drinks too. I tell her that I am goblin. But I can not see the repulsion in her eyes. I kinda like her. I ask her if I can penetrate her. She doesn't say anything. I licked her body clean. There is a pond which I had created in my last life from the waterfalls water. I strip her clothes down. Then I strip myself. I bring her to the pond. We bathe. I carry her to the cave. I make her sit in my lap. I kiss her. I start sucking her breast. I put her down. I put tip of my dick in her clitoris. I play with her. I put her legs in my shoulders. I bend her body by leaning forward because her legs are adjacent to my neck. My dick is still waiting outside playing with her clitoris. I move my dagger little lower and I pierce through the last defense. My dick is a tightly sealed space with warm fluid. I pierce her again and again and after 5 minutes I cum.
My dagger is in blood so I wipe it away with handkerchief.
After one hour I take body strengthening potion my body visibly increases in muscle mass and my height grows to 6 feet.
I ask her if she want a body strengthening potion. She seems to be a D class hunter. So she is happy about it. She drink it. She grows from 5.3 foot to 5.7 foot. Her curves and breast are more matured. I tell her my story and and tell her that I will take her with me. She doesn't agree. Then I tell her that I will help increase her class easily. I will be like personal trainer. She suddenly agrees. I ask her why. She says that she wants revenge from orcs. I don't ask her more question. I am planning to stay here for a month at most. After that I stab her again. Since she has already have enough physical requirement for class C I infuse my own ki and give her a feel of revolving ki inside the body. I do this every day to her. So her practice speed is phenomenal because I am a B class with excellent ki control teaching a D class is easy. Today 15 day has already passed of our living together. She is half way C class. So I make her give me blowjob. Her getting tired after practice and sex and goodnight blowjob soothes my heart. It has been a month and it seems our ki is getting purer. I had heard that regular sex can help purify ki in my last life. But I did not expect it would be this good. But in my last life effect we're not this good. So we start examining the cave. We blocked the entrance for good and we start digging the cave. After another of digging we find a spirit vein in the cave. We can not sell the vein. It could be used to create an army. But this is our secret. So we start living on fish. Food, sex, practice, sex, food , sleep , sex and the cycle continued for six month or so. She had broken through to C class long ago. Since she had little ki it would only take few years to purify it. Mine would take decades. But we were literally in a spirit vein. We were continuing our cycle. Within 2 years her ki was pure but she had not broken all the acupoints only 300 out of 365. However she was near. Meanwhile I was trying to release my ki out of my body as a projectile. My ki would dissipate half way because it was not pure enough to be called class A. Months pass by we are in cycle of practice, sex, food and sleep. I make sure to not impregnate her with my ki. After another 6 month she has opened all 365 acupoints. I can somewhat hit from 20 feet distance. I can be considered pseudo A class for now. Since my range of perception is 60 feet, To be able to be called a A class I have to be able to hit a target which is 60 feet farther. Another 6 months past and I can do 40 feet now. Whereas naina has can do 10 feet. Since she already had pure in C class. After breaking through to B class she didn't need to purify ki and just had to practice ki release. After another year passed she can do 40 meters and I am a full fledged A class. I wait for her to reach A class mean while I use ki to levitate as much as possible. Now the cycle was food while levitation, sex while levitation, practice and everything else. To become a S class you have to control ki to such fine degree that you can fly through air. First step to flying was of course levitation.
Finally when she broke through class A. We left the cave.