I'm Not a Woman, but I'm a Magician

The Big Bang gave birth to two worlds that overlap and coexist like air and light, which can be explained by superstring theory. The outer world is reality, and in the center of the inner world stands an unknown giant tree, which is called the "Kabbalah Tree of Life" by our ancestors. The "mana" factor emitted by the giant tree gives the residents of the other world magical power, but only women can transform it into magic. Magic power is both strength and asset. Since magic power is distributed equally to all children, in order to prevent mediocre offspring, aristocratic families generally only give birth to one girl. With the giant tree as the center, there is a strongest magician in each direction who rules the inner world. The inner world is benefited by Mana in life and feeds back to the tree after death. This symbiotic balance has been maintained for five thousand years. Until 100 years ago, a group of men with low magic power and the inability to use magic defected from the system due to dissatisfaction. Established the "Sunset Dawn Society" in the outer world to secretly fight against the nobles. It is said that various unsolved mysteries in the surface world are caused by their experiments. Due to the huge exodus of the population, the magic power that feeds the tree has dropped sharply. The symbiosis chain broke, and the giant tree began to forcibly withdraw its magic power. The people suffered unreasonable disasters, a territory was forcibly claimed by the giant tree and became a dead end, and one lord was missing. In order to prevent the destruction of the other world, the nobles changed their strategy and no longer killed the traitors, but mainly arrested them. This is not a war, so only elites are needed. The lords each sent a genius to form a magic recovery team to capture the traitors. Our protagonist Siegfried is an alien. He is male, but he can use magic. For the glory of the family, Siegfried must join the magic recovery team as a magical girl.