I'am looking for a manga from 2010-2015.  

Context: I always watch at least the first 3 episode of a serie before judging it. In a recent conversation about the worst anime scene, 
I remember an anime with a quite recent look and feel that  was label as "Horrible" in my mind.

Those following scenes are from the first 3 episodes, they are related from how good I remember them instead of speculative chronological order. 

- A homeless 10 years old boy travels with the corps of his dead granddad fold in half in a troley.
 After inserting is freshly licked finger in the wound trying to patch the hole in his chest. 
 
- His grandpa want to teach him a last Lesson hugging him really strong while he turns cold.
The boy is completly lost and doesnt understand the concept of death so he travels around the town asking for help without crying. 
It's night , and rain heavly. Every one reject or ignore him.

- The homeless boy ask for money everytime someone needs help as a salary.

- He is adpoted by a lady that work at night. 

- His new mother get shoot as he refuse to kill her. 

The main theme of the serie is about hero fighting crime in suit and mecha. 
With a pinch of inner evil. The serie plot look flat in my mind so it's not a blockbuster. 

The main openning song is annoying as hell, weird rap, off tempo.