Reincarnated into a Different Species, Parasitizing a Depressed Host at the Beginning

Xenomorph, a parasitic organism that takes over doves' nests. After completing the parasitism, it defeats the host's consciousness and takes over the host's body. Alien species, a kind of creature that fights against the same kind. They can become stronger by devouring their own kind! Chong Xiaoqi became such a heterogeneous species and parasitized Yun Xiaobai, who was suffering from depression. Zhong Xiaoqi, who was once a human, did not defeat Yun Xiaobai's consciousness, but chose to live with him symbiotically. And through hard work, Yun Xiaobai's depression was cured. The two cooperated with each other and eliminated one alien species after another. The strength increases all the way until it is invincible. After their strength reached its peak, Chong Xiaoqi and Yun Xiaobai realized that they were happy too early. There are even more terrifying things waiting for them!