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. 
(Source: Manga UP!)

An android that has long fulfilled its original mission and a child abandoned in the ruins of an old city. 
 
One comes across the other on rainy day, and a family is formed out of a machine and a human.
As they grow older, their story begins to involve other unusual pairings...
 
(Source: Manga UP!)

A droid picked up an abandoned child and decided to raise it.

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