So it was a manga my sister told me about, pretty sure it's old, but in the manga the Mc was a detective(?) Or police(?) But anyways he was told by a rich man that someone had been disturbing his daughter at night so the Mc takes the girls place and waits for the culprit, but as it turns out the moon(?) God had fallen for the girl or smt and wanted her to bear his children but it didn't happen cuz Mc was in her place, so anyways they couldn't find anything but then later when mcs friend goes to check on him cuz he was not coming out for a while he finds that the Mc is pregnant. (And it seems he does give birth to the God's children)
So it was a manga my sister told me about, pretty sure it's old, but in the manga the Mc was a detective(?) Or police(?) But anyways he was told by a rich man that someone had been disturbing his daughter at night so the Mc takes the girls place and waits for the culprit, but as it turns out the moon(?) God had fallen for the girl or smt and wanted her to bear his children but it didn't happen cuz Mc was in her place, so anyways they couldn't find anything but then later when mcs friend goes to check on him cuz he was not coming out for a while he finds that the Mc is pregnant. (And it seems he does give birth to the God's children)