Gokigen You! Gohan-sama: Moto Reijou Danshi no Atarashii Nichijou

Masumi Oshizushi is the daughter of a wealthy family. She is the envy of everyone, but the cost of her elegant life is restrictions. Her secret dream is to eat ramen... Masumi suddenly turns into a "boy!?" The story of a TS lady's first experience with common food.

(Source: Shonen Gahosha, translated)