I Played a Servant for 100 Days and Became the Witch's Mistress

Not long after transmigrating, Ron faced the darkest moment of his life in another world: he became the slave of Deluta, the Absolute Witch. The Absolute Witch, one of the seven Great Witches, wields the authority of [Absoluteness]. Even dragons tuck their tails between their legs in her presence. The good news was that on that very day, he awakened the [Master of Roleplay System]. As long as he played the role assigned by the System, he would receive a reward. His first role was [Witch Deluta's Personal Servant]. The reward was [Become the Master of the Absolute Witch Deluta]. So Ron had only one thing to do: survive for 100 days. Today was day 99. Just one last day, only 24 hours. All he had to do was stay alive... A day later, a witch knelt before Ron, her face full of disbelief and humiliation. “I, Deluta, the Absolute Witch, hereby declare: “I absolutely will... become... Lord Ron's most... loyal... puppy!”