KEY TO HAPPINESS:(My mute devil) - Chapter 94

One day, unfortunate news flew all the way to the Mage’s City. The mage, Solar Xing Ayra’s, entire family had been killed in an accident. Thus, he must now become the next Lord of the Solar family. The childhood home he returned to felt unfamiliar and strange. He barely managed to conduct a funeral with advisors that regarded him with suspicion. After fainting from various stressors, he woke up and… “Hello, Master. Nice to meet you!” ^o^ From now on, I’ll be the cute GM spirit fulfilling Master’s dreams: ‘Adventuring the world!’, ‘Fun estate management!’ I’m so happy to be with Master from now on, yay! “Enter a name ______” … What is this pebble-like spirit that calls me ‘Master’? No matter how you look at it–these level-up quests and these system windows…they were similar to a game’s user interface from his previous life. What is this… thing that seems more suited to modern civilization? Reminiscing on the games he had longed to play, Ayra worked hard on the quests. And, slowly, he also began exploring the territory. However, the territory… [D-234 days until the fall of the Solar estate.] “There are 234 days left till ruin…?” Alright, let’s start with the coronation ceremony. Things will work out somehow.

Mu Yue traveled to the world of Naruto and became an ordinary chuunin teacher at Konoha Ninja School and a member of the Root Organization.

Fortunately, after awakening the teacher system, you can become stronger by teaching.

In order not to become Danzo’s consumables, Mu Yue worked hard to teach and increase her strength.

“Complete the teaching rated A for the first time and receive the reward – mastery of fire attribute chakra properties change.”

“Under your guidance, Uchiha Shisui has worked hard to practice, and his overall strength has been greatly improved, and he has been rewarded – the Immortal Human Body!”

Under Mu Yue’s guidance, Zhishui understood that the village’s enemies were not necessarily other big countries, but could also be within the village. People who spoke righteously about the will of fire might not necessarily act in accordance with the will of fire.

Obito got rid of the title of being the weakest person in the ninja school, and Metkai became a master of physical skills even earlier…

- Description from novelbuddy

Our protagonist Caam is a man from Earth that was reincarnated into this world as a demon. In order to survive, he spared no effort in avoiding the sparks of battle and without noticing it, he became strong himself.

In her previous life, she was a highly respected Heavenly Empress, but on the eve of her wedding, she was betrayed and died by self-immolation!