Looping for this manga

I remember That it Was a shonen or maybe à seinen
The MC had a sister Who died in the first chapter while the mc was left at death door. Some dude saved him and remolaced his missing limb by mechanical part and then he fight against some evil people who I don't remember. But I remember that all the people ine the mc party had something in their body that was missing and switched with mechanical and thank to this they could fight