Please Twins!

Maiku Kamishiro's life is a mystery when it comes to his past. The only clue he has to his family's identity is an old photograph showing two young children, a boy and a girl, playing in a small pool outside a blue house. With a newfound sense of purpose, he moves to this blue house and begins working as a programmer. However, his comfortable life is disrupted when two girls show up at his doorstep, both in possession of the same photograph, and both claiming to be his twin.