searching for ashoujo manga about a girl who was supposed to get married but the day of the marriage the guy dies and the girl is said to have killed her husband because she had no reaction when he died
maybe http://www.mangago.zone/read-manga/shinigami_hime_no_saikon/
searching for ashoujo manga about a girl who was supposed to get married but the day of the marriage the guy dies and the girl is said to have killed her husband because she had no reaction when he died