Shi ni Modori Reijou no Karisome Kekkon: Nidome no Jinsei wa Kimajime Shougun to Seijuu Mofumofu

Ever since losing her parents at a young age, Celeste Golding has lived an upright life despite being bullied by her brother and sister-in-law and their daughter, and has become a successful star beast user. However, she is sentenced to death for the unjust crime of treating a star beast unfairly... but for some reason, she finds herself back in her childhood!? A girl who has had everything taken away from her finds her own "life" again... A story of redoing things in another world!

(Source: Shonen Gahosha, translated)