Building a Harem in a Noble House

What do you do when you can't beat the Demon Lord on your own? Go back in time and build a harem, of course! Well, that wasn't the goal. Lloyd May's actual goal was to build a powerful Noble House alongside his childhood friend and surrogate sister Lyra Knight. They'd buy the crumbling House Greaves, turn it into House May, then recruit a bunch of powerful adventurers to join them in their fight against the Demon Lord! But it could never be that simple, could it? A demanding daughter of House Greaves, a lonely paladin and her weird magical pet cat, a retired magic tutor, and a haughty dark mage… and all of their strange demands. As long as it leads to the Demon Lord’s death, Lloyd May will do anything. — Description from novelcodex.org