Make Me a Hero? Sorry I'm Not God!

[No system + invincible flow + transformation + superpower + hero + single female protagonist + combat + high martial arts] World 21st Century: With the rapid development of human science and technology, invasions of alien monsters similar to those in myths and legends have appeared inexplicably in various parts of the world, and along with them came space cracks. Among these alien races are mermaids with upper body parts of human body and lower body parts of fish (of course there are also lower body parts of humans), bird-men or angels who have a pair of wings but are somewhat different from those in myths, and actually hold a bunch of high-tech equipment, as well as monsters that will frighten the instinct of living creatures at a glance, etc.—— Humanity suffered heavy losses in this war to defend the world. Humanity, which lost most of its territory and population, ushered in a turning point at this critical moment. People with special powers appeared among humans. Under the call of the superpowers, humans launched a counterattack against the alien monsters. However, even though humans only regained a small part of their territory due to desperate resistance, the emergence of superpowers has caused crime rates around the world to skyrocket. Some self-proclaimed superpowers have become kings of the land. They use superpowers to force the weak to surrender, splitting most of human cities into cities ruled by people with special powers. Along with various crises and despair, the first real superhero in human history was born!