Hey! I'm totally not sure if this is the right place to put this, but I'm really wanting to watch a drama I've seen before but I can't find it on my watched list.

It surrounds a father and his kids (maybe just kid) he works at an aquarium and his child is in need of some sort of transplant. He comes into contact with a young adult woman who works in a massage parlor who has a brother who just uses her for money and she agrees to become a donor to the child, but she has to marry the dad because it's illegal to pay someone to give organ and such to another person.  She ends up moving into his home and bonding with the family.

The cover art for the drama was a shot of the ML and FL infront of an aquarium and I -think- it was Japanese, but I'm not sure.  Please help!