I Really Don't Want to Be the Sandjo Family's Live-in Son-in-Law

After transmigrating to the Moon nineteen years ago, Louis finally awakened the memories of his past life and began his new life. Come on, let me see who's unlucky enough to run into me. I can't wait to... [The person standing before you is the Moon's strongest carbon-based life-form, connected to the Root from the moment of her birth. She possesses overwhelming magic and talent, can manifest the authority of the Ten Crowns of the Mother of All Beasts, and can restore the Beast of the Book of Revelation to the modern age. She wields power equal to or greater than that of a Magus: the Root Princess, the Monster Princess, the strongest human Master, and a lover of Aotian. And you just agreed to marry Irisviel in front of her.] ??? Wait, what do you mean I agreed to marry Irisviel right in front of Sajyou Manaka? Then I must have nothing to do with Sajyou Manaka, right? Right? No, no, no! Why has Sajyou Manaka captured me? Wait! Sajyou Manaka, what do you mean by calling me darling? And what do you mean you're going to turn me into a familiar who belongs only to you?! Gah! I don't want to transmigrate anymore! Sajyou Manaka, don't smile at me... I'm in Type-Moon, just transmigrated, eyes open to a dark hotel room, eyes closed to Sajyou Manaka. Question: How do I reach the pinnacle of life as a transmigrator? Answer: If Sajyou Manaka doesn't turn me into a familiar, I've won!