We Might Be Related
Having the same blue eyes, Kamishiro Maiku might be related to one of the girls that has just entered his life. Having faced with this dilemma, they gather around a table, each with their own photograph of this house which might concern their past. The photograph of a little boy and girl.
Aired 22/07/2003EP 2 - We Might Be Related

Please☆Twins!
Maiku Kamishiro's past has always been somewhat of a mystery to him. The only clue he has to who is family might be is an old photograph showing two young children, a boy and a girl, playing in a small pool outside of a blue house. In an attempt to find his family, he moves to this blue house and begins working as a programmer. He's living a comfortable life until the day two very different girls show up at his door, both in possession of the same photograph, and both claiming to be his twin. With no way to prove who is a relative and who is a stranger, Maiku allows both girls to move in with him until they know for sure.
(Source: Anime News Network)