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The Young Head's False Bride Cannot Escape From her Bondage Tonight

I dropped out of college to pay back a huge debt my parents had incurred, and I was living a hard life full of failure at a black company where I had found a job. I signed a contract with him as a fake wife in exchange for the debt, but I didn't hear that he was also my sexual partner...!?

Where I found the translated version: https://comiko.net/series/132260

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> I'm legally married but this is still a false marriage
> I did the ceremony but this is still a false marriage
> I have a husband but this is still a false marriage
> I'm having sex with my husband but this is still a false marriage
.
.
.
> I'm pregnant with my husband's kids but this is still a false mariage
> I'm growing old together with my husband but this is still a false marriage

Then what the hell is a a "real" marriage?