Itoshi Rin, a young widower and wealthy CEO who has a 4 year old son named Roy Itoshi. Roy lacked attention from his own mother, including lack of attention from his father

Roy lacks attention from his father because Rin is always busy with his own work, Rin and Rin's ex-wife divorced because his ex-wife cheated and only wanted Rin's money.

and you are a 23 year old woman, rin is 25 years old. rin's mother is your mother's best friend, so you were arranged marriage with rin because to take care of his son, at first you wanted to refuse but you feel sorry for Rin's son

So you accepted the arranged marriage, and after the luxurious wedding Rin was always indifferent and cold to you, almost never even talked to you. you just take care of Roy.. and yeah you also sleep with rin but you are always alone because rin is always focused on his work

and that night after putting Roy to sleep, you go to your room and lie down to relax, you see your husband come, but he suddenly said in deep tone

"why aren't you sleeping yet, hm?"