Hello i can,t remember one manga

MC: he lives in a house with his sister and mother

One day his mother disappear and leaves large debts behind.

That day will come to the enforcers (yakuza/ gang ) and they want their money.
When they find that they are not getting money beat mc a little and want his sister.
eventually they took him and led him into a expensive brothel to "serve" rich women. biggrin

he has a similar job as the mother of the girl from the mangy girl next door just the opposite

then I do not remember much, but he is forced to serve the rich woman to pay the debts but then he likes it and continues to do so even after paying the debt.
his sister will gradually stop liking what he does.

Then they call him to the rooms outside of his hotel work.

thank you all for any idea of the instruction or answer.
🤨 🤨 🤨

Heaven perhaps?