The End of the World: the Good-For-Nothing Brother's Counterattack

[Apocalypse + Creation + Ability Recovery + Cute Baby + Cute Pet] Brother counterattacks, fights monsters, upgrades and falls in love My sister healed and acted cute and picked up rags Plague, zombies, earthquakes, acid rain, volcanic eruptions, extreme heat, tsunamis, floods, alien beasts, extreme cold... My brother and his little sister, a cat-type mythical beast, are fighting against each other in the apocalyptic world. Gou is so powerful... Ps: Brother Xianyu is 19 years old, brother is a nanny (don't look down on him too much), and sister genius is 1 and a half years old (don't look down on her too much) The male protagonist is not reborn, has no system, and is not invincible, but he has a sister Doraemon who follows the logic of simple biological evolution and energy conservation... There is a period of growth... The introduction is incompetent, please read the text in detail... (Those who have read the first 50 chapters are considered to have really read it, those who have only read three, five, and two chapters will not understand ╭☞(￣ ▽￣)╭☞....)