Demon Lord, He Always Interrupts Me to Talk About CP.

She was transformed into a vicious female supporting character in a fairy-tale sadistic novel. The original heroine was crazy about the male protagonist, but was eventually crushed by him and turned into ashes. Looking at the male protagonist who will unify the three realms in the future, she decisively replaced the poisonous wine in her hand with sobering soup - to save him, help him, bring him and the heroine together, and then hold her thigh with peace of mind to collect rent, this is the kingly way! But, why didn't he go to the heroine after he became possessed, but instead surrounded her small house with water?