Is Earth Still Alive Today?!

In 2012, countless mysterious "Rifts" began appearing all over the Earth for reasons unknown. Through these "Rifts," beings from higher dimensions whose words could not be comprehended, creatures from other worlds, pollutants, and more invaded the Earth. They coveted the Earth and fed on it greedily. Humanity became a flock of lambs trapped on Earth, slaughtered at every moment. Cries of agony from those who died horribly echoed in every corner of the planet, while their home was plundered and destroyed. With nowhere left to turn, the seven great nations joined forces with the remaining smaller countries to form a world government organization. They would do whatever it took to save the Earth! The cost was so horrific and heavy that no human could bear to look directly at this darkest chapter in history. In 2021, the Earth is still fighting to survive! Zheng Shu knocked on a door, holding a birthday cake in his hand. Nervous but earnest, he said, "Number 44, I'm the new director sent by the World Government's Special Anomaly Handling Agency to replace the previous one. According to the records, today is your ninth birthday, so I..." The door opened. The man who came out was even taller than Zheng Shu, who had once worked as a secret agent. He yawned, his black hair hanging over his eyes, his long legs leaning against the doorframe. He had the decadent, languid air of an adult, and the madness of the past lurked in his dark eyes. He gave a careless, seductive smile. "Oh, right. In this world, I am technically still nine." Zheng Shu: "!!!" Who was this one-meter-ninety-tall, disheveled, devastatingly handsome man standing before him?!! Additional information: (1) The protagonist is an enhanced human. Although he was born in 2012, he is not actually nine years old!!! He spent a very long time in other worlds and has long since reached adulthood. It's just that time flows differently on Earth than in those other worlds, so his identity on Earth lists him as nine! (2) The protagonist's name is Number 44. The name on his second ID card is Lin Si. (3) The love interest is a golden mushroom that can shapeshift and take human form. His identity is confidential! Theme: Independence and self-reliance