Starfall: the Age of Poison Tide

[No system, not brainless, logical reasoning, weak in the early stage, but more and more brain-burning in the later stages. The crash of an alien wreckage triggered a strange green wave of poison. Student Li Mingyu's home was instantly reduced to ruins shrouded in poisonous fog. His parents also suddenly lost contact in the disaster. He clutched his young sister's hand and embarked on the road to escape. "Finding his missing parents" became the only belief that supported him against fear. In order to keep this belief, he fought through life-and-death battles with mutated creatures and alien creatures infiltrated by green poison, and grew from a trembling student hiding in a corner to a guardian of the world. He took his sister to persistently pursue the traces of his parents in a land ravaged by green poison, and his belief gradually expanded - not only to find his family, but also to rekindle vitality in his homeland that had been severely damaged by green poison.