Mechanical Buddy Universe

A humanoid machine that has completed its mission. An abandoned child born of war. They met on a rainy day, in a devastated world. Then the machine and the human have become a family.
Source: MANGA UP!

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!)

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