https://www.dmm.co.jp/dc/doujin/-/detail/=/cid=d_490758/

精子掻き出しサービス、女性の膣内、子宮に残留する精液を100％取り除くサービス。
このサービスを知った大学生りょうは彼女であるみきとの行為中、許可を得ることなくコンドームを外し、抵抗する彼女を無視し中出しをキメた。
怒りを露わにするみきにりょうはスマホの画面を見せる。’精子掻き出しサービス’

彼はこの選択を後悔することになる。

彼氏の愚行による自業自得NTRとなります。NTRの中では軽めの部類かと思います。
可愛い女の子が圧倒的な力（チンポ）に屈服される様子を楽しんでください。

Base +25

Isn't netorase. It's a pretty weird netorare plot where BF cums inside the heroine and she gets mad because he did it sneaky.
So he tries to appease her and calls for a new online service to clean her uterus from the semen but then it's this shady guy who scrapes the semen with his dick and he actually does BUUUT then keeps going fucking the girl and cums inside against BF's protests and the shady guy says he did his job and to try his service next time. Really weird plot tbh.

Base +22, molenewe +6

[Synopsis]

Sperm scraping out service + a service that removes 100% of the semen remaining in a woman's vagina and uterus.
Ryo, a university student, learns about this service and removes the condom without asking permission while having sex with his girlfriend Miki, ignoring her resistance and cumming inside her.
Ryo shows Miki the screen of his smartphone, which reads 'sperm scraping out service' and he comes to regret this decision.
---------------
This is an NTR story that he brings upon himself due to his own foolish actions.
Enjoy watching a cute girl succumb to the overwhelming power of cock (͠≖ ͜ʖ͠≖)

Base +28, Coledas Ukgent +18, TheProtector +1

I understood the plot as being that the BF misunderstood that the so-called "Cum Removal service" was actually just a Cuckold service of some sort and he either didn't know or pretended to be daft about it. That would make the most sense to me.

Base +7

Jesus. The look on her face before the even does anything. XD

Base +15