Roseward was too soft with this. He, as a master, should have more fraitening look and attitude towards his slaves, so these slaves will fear him and knowing that he is a real deal and not a person to playing around with.
Yooo, this manga make you experience how its feel like to be a miserable cuck in an isekai. This is crazyyyyyyyyyyyyy
Fr tho whats wrong with japanese? Why these genre is popular? If its the manga version of novel then this novel must be decent popular right?