Gigantis

Tsushima, Nagasaki Prefecture. Gen, a high school student living with his mother and sickly younger sister, starts his day like any other. But everything changes when a mysterious creature suddenly appears. This monstrous being devours and assimilates the island’s residents, rapidly taking control of the island…!? On that day, the throne of power is consumed by predation! A desperate sci-fi survival story begins!

(Source: MANGA MILLION)