Responses
It was not his sister but the girl he liked who died.
Here ya go
http://www.mangago.zone/read-manga/flow/
Thank you
Ok anyone know a manga where there is a world that when your born you get a familiar who will grant you one wish anyway it’s about a boy who’s sister is killed so he wishes to turn back time to stop his sister dying and it turns out his cat familiar is actually the white tiger