Tensei Reijou wa Goinkyo Seikatsu o Okuritai!: Outaishi-denka to no Kon'yaku wa Goenryo Sasete Itadakitaku

Synopsis:

I learned that I was the daughter of a duke who had been confirmed as a "saint" while I was supposed to be reincarnated as a mob. I am so sad that I must do that! Refresh your memory of the Nyanko God's "Stealth" ability and strive for a laid-back retirement! The Crown Prince—also referred to as the "Noble Prince of Absolute Ice"—came up to me with an impassioned proposal just as I was about to accomplish that! Do not look into those melting eyes, please!