Asami Onohara is a seventeen-year old high-school student with a secret which has not been revealed to anyone: She is already married. Her husband, Kyosuke Ichimaru, is a Physics teacher in the same high school as her. However, even though they are officially a married couple, Asami's father forbids them to have any sexual contact until after Asami has graduated. Asami has to hide the fact that she is married to Kyosuke while trying desperately to further their relationship, and it does not help when there are so many interferences and obstacles from her father and other third parties.

Fate Graphite is one of the forsaken. Cursed with the skill "Gluttony," he is ever starving, never sated... until the day he kills a dying thief and devours the man's strength—and his soul. The true hunger of Fate's Gluttony has awakened, and if he can learn to control his power, he will at last be the master of his own destiny.

August 1945. In a converted theological seminary on the outskirts of Nagasaki, a young doctor works to help his patients, as unsettling news comes of a new weapon used by the Americans on the city of Hiroshima. When the second nuclear weapon is dropped on Nagasaki, the hospital staff must work to save lives in the midst of the concentric circles of death that their city has become.

Momoko, who attends a special school, is both mentally and physically disabled. Every morning she becomes peevish because she can't go to the ordinary school with her twin brother Riki. Her family soothes Momoko by singing her favorite song "The Song of Frogs." One day, Momoko shouts encouragement to Riki who's playing dodgeball at an open classroom day and Riki's team wins the game. Ryuji, whose team lost the game, is not impressed and demands that Riki stop bringing his 'idiot sister' to school. Riki totally loses control and hits Ryuji with all his might. The following year, an experiment in integrated education is implemented and Momoko begins to attend Riki's school. Unfortunately, her physical condition takes a turn for the worse and she's sent to a hospital. Riki and all her classmates want to cheer her up and they set a goal of winning a relay race so that they would be able to tell Momoko the good news. Meanwhile, the fastest sprinter, Ryuichi, insists that he won't be taking part in the race.