The Weakest Master’s Cuckolded Adventure [Pure Ban]

Synopsis

The Master woke up in a cold sweat from a nightmare.

His beloved junior colleague gently touched his shoulder and looked at him in surprise.

“Good morning, Senpai!”

After hearing about the usual mission from her, he headed to the command room.

Just another routine mission.

Of course it would be easy—I have the strongest ally after all…

Or so I thought, until the summoning failed and that man appeared instead…