The supporting character has no counterattack

Read manhwa The supporting character has no counterattack / There Is No Counterattack From the Supporting Character / 조연의 반격은 없다
After being transported into a novel she read, Agrain tries to live a quiet life as a side character maid. But that changes when the novel’s timeline is suddenly altered and she finds herself working directly for the terrifying Duke Ingord. Agrain knows that the only way she can survive now is to do anything he asks…but what exactly does he want from her?