ALIVE: The Final Evolution

Plot

(I'm kinda took this plot just from Wikipedia, u can just read this manga in mangafox.com or onemanga.com as usual. Enjoy reading it)

The story follows Taisuke Kanou, a teenage student in Japan who lives a normal life with his sister Yoko Kanou and his friends Yuichi Hirose and Megumi Ochiai until a dark being in space senses life on Earth. The sky suddenly becomes dark and mass suicides begin occurring worldwide. The dark-being, Akuro, is the result of many souls of a civilization who were granted immortality who wanted to die but could not without a body. When Akuro found Earth, it separated and entered human hosts and tempted them to commit suicide. Those who resisted were granted powers relating to their own unconscious desires. When Hirose discovered his powers, he kidnapped Megumi and headed north to the heart of Akuro. Taisuke, obtaining his own powers, follows in an attempt bring Hirose and Megumi back home. On his adventures, he learns people with powers are called Comrades and is accompanied by comrades Yuta Takizawa and Nami Kusonoki. He tracks down Hirose to a lake where he absorbs Akuro's heart. Taisuke defeats Hirose by triggering a volcanic eruption, seemingly killing them both and destroying Akuro's Heart as well

Two years later Yuta and Nami learn from Aoi Tezuka and Jun Tezuka that Taisuke is alive. They meet Taisuke who was revealed to have amnesia but he soon regains his memories. They learn from Yukie Tezuka that the Army has the Heart of Akuro and they must set out to destroy it. Their first attempt to invade the base ended in failure. Soon afterwards the army attempt to transport the Heart elsewhere, but due to Katsumata's interference, the Heart is sent to the bottom of the ocean. After resting and finding their reasons for fighting, Taisuke and the Tezuka family attempt to retrieve the heart a second time resulting in failure due to Katsumata's comrades injuring Nami and Taisuke, and the Military kidnapping Aoi. Their demand is that Taisuke come alone to an oil platform to raise the heart. Taisuke complies, but Yukie arrives with a ship full of soldiers she has taken over, using them to massacre the army until her daughter is released. While this is ultimately successful, her plan to use Taisuke to destroy the Heart is interrupted when Hirose awakens and emerges, killing her to claim her piece of the Heart.