Maid & Re-Masters

Decades ago, an Estate was attacked by Servants of an unknown Master. Their only goal seemed to be the deaths of everyone on the grounds. There were no survivors. Our protagonist Master had been kept away from the destruction by his uncle, who raised him. With no one left alive to explain why he had to grow up an orphan, he returns home with a single Servant - his childhood friend - seeking to rebuild his family Estate and take revenge on whoever tried to burn it to the ground. And hopefully build a harem of cute Maids along the way