Ame to Shiawase wo Tsuretekite

Lisa works at an animal hospital and loves horses more than anything else. Although she shows no interest in marriage, she does find herself interested in veterinarian Nick. Thinking he would be an ideal candidate, she asks him to give her a child. Sadly, he refuses. But Lisa isn't giving up. Around the same time, Nick's twin brother, Neal, suggests they switch places to shake things up. This means Nick would move to New York and live as a popular TV host for a while, and Neal would take his place at the animal hospital. So when Neal switches with Nick, he's unaware of Lisa's baby agenda... (Source: Renta!)