Issho ni Zangyoushimasen ka, Koutaishi-sama

Mika Eto, a corporate slave designer at a major company, should have ended her life from overwork. Instead, she reincarnates as Minuet Rubain, a baroness facing an arranged marriage. Minuet hadn't wanted the marriage, but learning her partner was the Crown Prince changed everything. Delighted at the prospect of a life of luxury, she cheered, “Long live arranged marriages!” However, the portrait she receives shows a elementary school student?! And the royal family is facing financial difficulties! Minuet impulsively refuses the marriage, only to be branded in the newspapers as “the insolent woman who rejected marriage,” sending her reputation plummeting. All she wanted was to live peacefully in this life... Driven to desperation, Minuet tries to seduce a man she meets at a party, but... Can she truly grasp the “ordinary romance” she desires?

(Source: Weaven, translated)