Black MarriageNew黒婚－ブラマリ－; BuraMari

The foster home my parents left behind is one day sold off and endangered!! I'm in danger of losing my house a second time, but suddenly a mysterious hot guy appears and saves us.... His condition is for me to have a 'contractual marriage' in return!? source: https://www.mangaupdates.com/series/bhwwspk/black-marriage