Manga by author Takashige Hiroshi

From Yen Press: Haruka Tooyama is a twelve-year-old girl with incredible precognitive abilities. But her accuracy in predicting the future has made her a target for any number of greedy corporations that would use her power for their own profit. When she is kidnapped, Haruka uses her gift to seek out someone who can help her escape and fixes upon a blind man making his way through the busy streets of Tokyo. Though it may seem an odd choice, Haruka's powers have not led her wrong. Despite his inability to see, her chosen protector's fighting skills become apparent when he draws a sword from his walking stick and deftly takes out her captors. Knowing she will always be pursued for her gift, Haruka begs the mystery swordsman to keep her safe... "Until Death Do Us Part".

Set in the near future where Mother Nature has decided to fight back against all of the human encroachment. It has your standard apocalyptic scenario, but we're right in the middle of the apocalypse actually happening, rather than the aftermath. Vines and foliage entangle cities, as large wooden mech-like creatures called Arethusa (named after one of the mythical Greek Hesperides that tended the gardens in a remote corner of the world) rampage through cities. Our main character is Souma Shin, a punk kid out of Japan. We start off with him coming to visit his twin (?) brother Ken. All hell breaks loose as Shin finds a group of small kids being used for military purposes, and tries to save them in the confusion created by an Arethusa invading the compound. taken from zindryr