Tensei-saki ga Shoujo Manga no Shirobuta Reijou datta reBoooot!

Despite her noble status, Britney Harks bears more than a passing resemblance to a white pig—stinky, fat, and filthy. For this reason, her fiancé requests that their engagement be annulled. The shock of hearing this news causes Britney to remember her past life and realize that she has been reincarnated into the world of what had been her favorite shoujo manga. The character Britney is destined to join the wicked Princess Angela's entourage, which consists only of girls considered uglier than the vain royal. Determined to cut ties with Angela and thus escape future execution as the princess' scapegoat, Britney plans to slim down and shape up. However, her schemes for self-improvement bring unexpected advantages to her family's territory as well, attracting attention that she would rather avoid.