Filial piety: the supreme emperor

After rebirth, he got a cheat. The rules of this cheat are simple. As long as he treats the characters he is bound to with all his heart and soul, sticks to etiquette, and promotes the spirit of filial piety, he can be promoted to the supreme Immortal Emperor when he has fulfilled his filial piety. However, everything has its reverse side. Once the behavior deteriorates, the thunderous punishment from justice will surely come. Under such circumstances, he has to face the charming and evil master, and the mature and beautiful wife of the clan leader who is full of sorrow and resentment. ...