Air's manga / #contract marriage(4)

FL isekaid into a bl novel. she decides to get a contract marriage with ML seme so that she can get away from her family, survive and have money for independence. ML needs partner to visit specific parties for business to grow. ML is illegitimate child and not expected much, was suppose to meet uke partner after failing business and become obsessive over him while uke ends up falling in love with FL's sister.