Looking for manga old one

I read this when I was 11 and I never find it again it was talking about uke and seme who are married for long time and in a love until the seme started acting like he's a different person later we discovered the reason for that is the seme has kind of demon or cures inside I forgot the reason why tho anyway the way to stop it is by killing ppl and making him eating them so the uke did that and started to feed the seme humans meat without him even knowing