Getting Even by Being Friends With My Enemies' Offspring

Princess Stefanie spent her life one step from the throne, only to be murdered just before her coronation by those she trusted most. Reborn as an infant in a remote border town with all her memories as a princess, she discovers her killers have seized the empire and risen to ultimate power. Worse, she finds herself surrounded by the children of her very betrayers. She may be trapped in a helpless baby's body, but she still has her sharp mind. Now, Stefanie must carefully plot her revenge while growing up among the offspring of those who had destroyed her.

Original Webtoon:
AC.QQ, KuaiKan

Official Translations:
English (Tappytoon, Manta, Webcomics, Webnovel), Japanese