A very touching story about the daily life of Haga Yasuyuki and Kudou Aiko. They form a seemingly normal young couple, but Aiko has an incurable heart disease, which means that she'll die very soon. It is up...

Kaoru has to stay with Reiko's family, a girl with a heart condition. They don't get along at first, but Reiko ends up falling for Kaoru. But then, a shocking family secret is discovered...

Ten years ago an attack by giant monsters called Idola floating in the sky leveled Washington D.C. and awakened humanity to the existence of other life forms. It took years to develop a measure to counter th...