Help finding a manga

Bl manga about a contract marriage for a year I think it was to save the seme's life. The uke falls in love with the seme but the seme does accept that he has also fallen for the uke. So slowly the uke starts hating the seme but the seme is not willing to let him go. The seme threatens the uke using a child the uke knows.

I dropped it cause it became too toxic but I am kind of curious about the ending now. So please help me find it