The war (sasunaru Mpreg ) Mxb

Long long ago, the emperor of japan ordered that a Great Wall be built to protect his empire from the evil orochimaru.
In those days, a alpha son brought honor to his family by being a brave soldier. A omega son brought honor to his family by being a good wife.

So it was that a young omega boy visited a matchmaker who would find them a husband. They had to impress the matchmaker.