Saikano, "The last love song on this little planet"

At the beginning of the Third World War, in a little town (Hokkaido), Japan, a beautiful love’s story happens between two third year high school students. Shuji, who is on the middle of discovering himself as an almost young adult, and Chise, a shy little girl who always is saying sorry, are the protagonist of “The Last love song on this little planet.” They begging a relationship with a lot of problems, a couple of time they broke up, but they never forget what they really feel for the other. She sometimes disappears during attacks and when those disappears happen a strange kind of airplane save the city. The war continue to be worst and worst, this little couple witch started on war time, start to get trouble when Shuji discover that the strange airplane that always save the city is his little girlfriend. She starts to talk about dead as just part of the life, in a try of decrease the idea of that she kills a lot of person. A relationship between a solder, and a civilian that doesn’t want to know about the war is always hard. Sometimes they try to escape but the army always fined her. Until one day that they run away to another town and live like husband and wife for a while, until they get out of medicine, a medicine that Chise needs in order to be alive. Shuji without known what to do, call the army, they took Chise away from him, and he return to his town. Shuji lost a lot of his friend thanks to the war and now also lost his girlfriend. Time pass, Chise starts to be a 100% time weapon and Shuji trying to help his friends and on the school during this war. At the end, Shuji and Chise find themselves again on their little secret places.
Chise is now more machine that human but doesn’t understand why she has that strong feeling for that person, Shuji, and why is she all nights on that places. They talk for a while and then they understand that before Chise become machine, the only idea, the only desire, the will of the real Chise was to love Shuji and to be mother of his children. That is why the machine Chise still has the same will. They enjoy that last night together, the next day the world will be destroyed. Shuji, the only one who has love Chise, told her that he wants to live. Chise, with her last life breath save him. Now, the world is gone, the only person on the whole planet is Shuji, nothing else remain, not even a cherry blossom. However, Shuji is happy because a light of live is with him, the light of the life Chise will be always with him.