After Seven Years of Living Together Day and Night, I Found Out That My Wife Is a Demon.

Lin Junyan had been with Tang Yumo for seven years since they met in the first year of high school. The years on campus were dull and gentle. She was the much-anticipated campus beauty with a pure appearance and a seemingly cool and gentle temperament. She quietly shuttled between the classrooms, the library and the campus boulevards. Lin Junyan slowly approached her and stayed with her day and night. They went through the difficult three years of high school, and then entered college together and survived four lush years. Others were envious of him for guarding such a dazzling girl. He also thought that he knew everything about Tang Yumo and believed that she was just an ordinary girl. He was fully planning for the rest of their lives to be ordinary and stable. Until the day of college graduation, when the dust settled, Tang Yumo took off the mortal shell that she had disguised for so long and revealed to him the eternal secret. She is no ordinary human being, she is an ancient demon who is powerful in the world. In the distant ancient battlefield, she fought alone, and the killings swept across all directions. Thousands of soldiers were afraid of her when they mentioned her name, and the entire ancient battlefield trembled because of her. The endless fighting and disputes made her feel tired, and she was tired of the never-ending war. She gave up the power of the Demon Palace, concealed her monstrous magical power, crossed the vast galaxy and came to the earth. As a new girl, she stepped into the high school campus and became the much sought after school beauty. Day and night for seven years, the fireworks in the world slowly calmed down the hostility in her body. But identity cannot be hidden forever. When the cruel and absurd truth is before his eyes, Lin Junyan looks at his lover who has been with him for seven years. The trivial daily life of the past collides violently with the legendary past of the Demon Lord. He has to face a problem: on one side is the promised rest of his earthly life, and on the other is the Demon Lord's lover who is burdened with the eternal past.