Shounen ai (BL) with caretaking / kids / parental uke + seme

Very cute + funny
Contains spoilers
Has supernatural elements
Uke takes care of seme's baby but he believes the baby is his
Seme comes to take back his baby but the two, uke + rourou love each other too much and wil never separate- the seme doesn't really try to seperate them
They begin to live with the seme
The seme actually likes the uke
And the uke begins to fall for him too
Uke is an actor
Seme is a businessman