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This work takes "there are differences between gods and mortals, differences between immortals and mortals, and humans and monsters have different paths" as the core, constructing a fantasy world in which spiritual power, divine power, immortal energy, and demonic power have their own inheritance. Monks and Buddhists practice with spiritual power, gods establish themselves with divine power that contains part of the power of rules, immortals achieve enlightenment with immortal energy, and demons rely on demon power and blood inheritance to grow. Between the human and demon worlds, there is a mysterious ancient divine tree - the Bitter Love Tree. It was transformed from the heart seeds and love threads of the ancient true gods. It was mistakenly called the marriage tree by mortals. Yue Lao's marriage tree is only its branch that records marriage. This tree transcends the rules of heaven. If a living being wants to seek continued destiny in the next life, it must exchange it for the most precious thing, but no one knows its exact location. Behind the story, an immortal who is about to be promoted to the ancient true god makes a bet with heaven: whether gods and immortals will be plotted and moved by creatures like "ants", and what is more important than peace and love in the six realms. Revolving around the formation that sealed the Weary Tribe, the fates of many male and female protagonists were involved. They fell in love across racial boundaries, but due to the rules of heaven, racial prejudice, and the tricks of fate, they all came to tragic endings. In the end, the Bitter Love Tree appeared, paving the way for the third part.