 If you liked
Variante
|
 ...then you might like
Midori no Ou
|
Both main characters have a weird arm. ^^
In both mangas the human kind is being attacked, but in Verdant Lord the attackers are trees and in Variante they're chimeras.
Variante and Verdant Lord features experimentation that changes the life of the main protagonist forever. Both series adapts an setting with apocalyptic themes. The main male protagonist also undergoes both physical and mental changes. The adaptability of their newfound powers puts them at conflicts with scientists and their friends. Both series also features some subtle romance although most of is downplayed given the nature of the story.