It tells us that comfort doesn't come from finding a perfect person. It comes from finding an imperfect, arrogant, demanding, historically-displaced lord who, despite everything, chooses to stay on your worn-out couch.
Dropping that Lord into modern Reiwa-era Japan (2019–present) creates rich, comedic, and sometimes poignant contrasts: It tells us that comfort doesn't come from
The Lord appears in a flash of light in protagonist's 2LDK apartment. He wears a military-style Imperial uniform and looks down his nose. "You. Servant. Prepare my quarters and a feast." The protagonist blinks, says "I have instant udon," and goes back to his freelance coding. The Lord is apoplectic. He wears a military-style Imperial uniform and looks
That is the strange comfort: unconditional (if demanding) presence. The manga uses "Jou sama" from the Imperial era for a reason. That period (late 19th to mid-20th century) Japan was rapidly modernizing but still rigidly hierarchical. Social rank was law. Politeness was survival. Prepare my quarters and a feast
The protagonist comes down with a cold. The Lord, who has never served anyone in his life, panics. He tries to boil water. He burns his finger. He spills tea on the floor. Eventually, he drapes his own (very expensive, historically priceless) military coat over the protagonist's shivering body and sits guard by the futon all night, grumbling about "weak modern constitutions."