Damn I know it's a oneshot but it felt like it ended before anything meaningful happened. Still, it was kinda funny though so I'll give it that.
Thanks for the translation (Rei has a lovely body if you ask me. She's delightfully petite with a cute butt and moderately-sized boobs. After all, B-cups you can tenderly squeeze are still better than E-cups you're forbidden to touch).
"If you increase the angle of your trust by 12 degree you will increase my pleasure by 123%"
"if you change our position as in this research paper, we can reach to a higher level of climax!"
"If we increase our pace by 1.2x we can do it 3 times before our bed time so we wont be late for school tomorrow"
Is this how geniuses have sex?