Ojou-sama, Oshokuji no Ojikan desu.: Reitetsu Reijou to Mitsobushi Juujin Chef no Oishii Shiawase Keikaku

Treated as a "cold-hearted young lady" by those around her, her relationship with her family is strained, and her former fiancé has become her younger sister's fiance... Mimosa is devoting herself to her work in order to leave home and become independent. However, due to past trauma, she cannot eat food cooked by others... And then, someone appears before her!? (Source: Akita Shoten, translated)