Onegai☆Twins

A man named Maiku Kamishiro has long been unaware of his past and has only a single photograph as a clue to his possible family. The image shows a boy and girl playing by a blue house. Hoping to uncover his origins, he relocates to the house and takes a job as a programmer. His life remains stable until two girls arrive, each holding the same photo and each claiming to be his twin. Unable to determine which is genuine, Maiku lets both stay with him until the truth can be established.