Nikkyuu 10 Man no Kekkon

Synopsis

Maika and her younger brother both remained resilient through their life of poverty. Until one day when they suddenly find themselves burdened with a massive debt of 30 million yen left behind by their father who disappeared...!? With no way to repay it and feeling utterly lost, a man named Nikaido proposes a contract marriage to them...? https://www.cmoa.jp/title/340133/