My cruel master, please stay

"What-what do you mean, are you going to leave me?" "You have it wrong, young one. I'm merely settling matters to focus on the one I'm mentoring." "...will you have time for me then? i wouldn't mind even a few minutes-" "What have i said about taking one's time to rethink situations?" "I-then i do not understand! clearly-" "Is this how I've thought you? i expect better. You've let your emotions take control, unless you step back and rethink, i will not indulge you in this conversation any longer." "But master-!" A young master who had no one by his side, parents too long gone to even imagine what they may have looked like is trying to hold on from grave loneliness and is at the berk of insanity. Surprisingly as years went by, the estate was still being handled well, he had no knowledge of how and why the title and riches were not being coveted, nor why none of the maids and butlers were lasting. Until one after noon at the age the young master turned 13, a voice rang out in the chilly and silent manor. "I've put it off for far too long, you're undoubtedly in need of a strict upbringing." An intimidating strict and stern mentor of the young master of a rich noble. where did he come from? how does he know so much? why is the young master sheltered away from the outside world? something is surely wrong in this household. It all started with a simple letter and hopefully the young master will hold onto his happiness.