Rennyuu Order The Animation

While his parents dig up ruins in some far-off country, Takayuki is living alone in Japan, leading a pretty quiet life — until a girl named Sasha shows up at his door. She's a princess from a place called Al-Fazhar, she's got a letter from his dad, and that letter basically says they're married now. No warning, no build-up, just: surprise, here's your wife. Sasha wastes zero time making her intentions clear either — she's there to start a family, and she's treating this whole thing like a royal duty she intends to see through. Takayuki, naturally, has no idea what to do with any of this. The setup leans into the culture clash between them and the sheer awkwardness of two strangers suddenly being thrust into the most intimate possible situation. It's a single OVA from Studio 1st based on a manga, so it doesn't overstay its welcome. If you liked the princess-meets-commoner dynamic in Princess Lover! or the sudden cohabitation energy of Ane Koi, this hits similar notes — arranged marriage played for both humor and heat, with a distinctive art style that makes Sasha stand out visually. It's a short, self-contained story that does exactly what it sets out to do without a lot of preamble.