Tensei Reijou wa Goinkyo Seikatsu wo Okuritai!: Outaishi Denka to no Konyaku wa Goenryo sasete Itadakitaku

Synopsis

I was supposed to be reincarnated as a mob, but when I realized it, I was the daughter of a duke who was the saint?! In my previous life, I was a Japanese woman of peerage, constantly exposed to the public eye. Facing the same scrutiny in my second life? No thanks! The kitty god bestowed a stealth skill, so I might as well use it! The goal is to enjoy a relaxed life of retirement. And yet... The crown prince, known as the "Lord of Peerless Ice," made a passionate proposal? Please don't look at me with those smoldering eyes!!! (Source: Kadokawa, translated)