I Became the Evil God's White Moonlight

She transmigrated into a doomed villainess destined to summon an evil god—and die horribly from the backlash. Her survival plan? Raise the slumbering deity before it awakens into a world-ending monster. Now she's stuck playing caretaker to an ancient entity who might just see her as his first love. Can she tame a god, or will she become his next sacrifice?