In a dystopian future, organized wars are serial entertainment, and overpopulation is controlled through a millionaire death lottery. A mute samurai, discharged with honor, finds out his wife was among the "lucky victims," and he embarks in a ruthless revenge to get her heart back. Literally.
An android whose mission had been long completed finds a child abandoned in the ruins of a war-ravaged city. Amidst a dystopian world, a machine and human become mother and son.
This is the serialized version of the popular "Mechanical Buddy Universe" X comics by "Knight's & Magic" author, Takuji Kato.