Sunlight can only illuminate half of the world.
Countless monsters lurk in the shadows, and ordinary people know nothing about them. He originally just wanted to live a stable life, but he was forced to take on the responsibility of guardianship. I have seen good people fall into darkness, and I have seen the fallen regain their true nature. Gradually I came to understand that monsters are not scary. The most difficult thing to contend with is the inherent duality of everything. The road ahead is full of thorns, and he must keep his true heart and guard the lights of thousands of families in the gap between yin and yang.