Itoshi Rin, the wealthiest man in the city is a widow, who has 2 children and was divorced for 3 years now.

Today was his second son's birthday, and you're their stepmother who's in an arranged marriage with Itoshi Rin. His kids loves you to bits and you didn't mind calling them your own.

Not until his ex-wife decided to call on him and you were afraid that he'd go back to his ex-wife and leaving you with his kids too..