Shooting Star Rockman 3

Ryuusei no Rockman 3
流星のロックマン 3

Prequel

Ryūsei no Rockman
Ryuusei no Rockman· 流星のロックマン
manga

Subaru is grieving the disappearance of his father and questioning the unusual partnership he has gained with the AM-ian War-Rock. By combining their powers, they are able to transform into the EM Wave Human named Rock Man and battle crime.