This is an interstellar world where all the people are lords. Xiao Yiyun is a child from a poor family (???). He has been obedient and filial (cruel) since he was a child, and his brother (not his biological child) has been accompanying him in his body until that day comes...
One body and two souls, one evil and one good, one yin and one yang.
Cold and decisive brother control (evil dragon) attacks x cold, gentle and kind brother control (snow fox) suffers
Purpose: The road to self-salvation