Abandoned by his mother and grown up in different orphanages, the only thing Kamishiro Maiku has left from his early childhood is a photograph showing the house he was living in and himself and a girl playing in a children`s pool.

When Maiku recognizes that same house in a TV report about an UFO sighting, he decides to travel to that peaceful town, search for the his childhood memories and start living by himself, in that house he`s so far only seen in the photograph.

One day, however, Miyafuji Miina and Onodera Karen burst into Maiku`s life. Both have the same eye color then Maiku and each has a copy of the same photograph showing a boy and a girl playing together, and each of the two girls introduces herself as Maiku`s twin sister...

Who`s the twin? Who`s the stranger? Look forward to a joyful and romantic drama about these three twins.