I love all of it!!!!!'s manga / #funny(5)

Princess goes back in time to stop a rebellion causing the death of everyone she loved. She became a brat so she would not be considered in line for the throne and to tame her younger bratty brother who ends up becoming a sucker in the first timeline. She pretends to be in love with someone and the guy mistook it for actual feelings so he rejected get and went away. He said he would never regret it but he started to regret it after 1 chapter. It's 3 yrs after her 16th b day where the witch gave her a necklace that disappeared