Hnnbl123's manga / #Isekai(3)

i like this manhwa because the chemistry is chefs kiss. The sister (not blood related but by legal paper) is reincarnated and tried to fix everything for his brother who will supposed to kill her. Thus, to avoid that from happenning, she will give the title to his brother when he is of age and leave the place. As of now the brother started to care for the FL favorably and sparks some romance from there idk HAHAHA