I Possessed a Demon Sovereign - Chapter 681 - : 679. Unexpected Change

Based on the popular Vocaloid series, by HoneyWorks, called “Kokuhoku Yokou Renshuu (Confession Rehearsal)“:

Natsuki, a third-year at Sakuragaoka High School, who holds unrequited feelings for her childhood friend, Yuu, who’s in the Film Club. However, instead of being honest about her feelings, she makes him be her confession “rehearsal” partner. Unable to say her true feelings, things start to get complicated when Miou and Akari, who are also in the Art Club, get involved! Will she ever be able to confess for real!?

Susu, a hard-working woman, accidentally finds herself in a novel set in the 1980s, stepping into the shoes of an unlikeable female lead who was resented by everyone in the family compound for causing endless trouble. She became Su Er Ya, the demon sister who threatens her husband to divorce if he dares to adopt the orphan of a comrade-in-arms. With such an unfavorable start, watch how she turns the tide. From selling braised goods to opening a restaurant, her career thrives, and in turn she becomes beloved and known for her magnanimous personality. Lu Xiaoting, a stern public security officer, realizes that the once lazy and gluttonous woman who took advantage of others has changed.Lu Xiaoting, embracing his wife: “Wife, don't be mad, I was wrong!”Susu, looking at the man with broad shoulders and a commanding presence reminiscent of a modern-day celebrity, smiles sweetly. She triumphs by mastering the culinary arts.Witnessing the transformation, their son Xiaoyu leads the three little 'turnip heads', Su's adorable children, who pout and complain about their father taking their mother away yet again.Whining, “Hate it, Daddy took Mommy away again!”“Ugh, Daddy really...!”“Big brother, we want Mommy.”The young boy comforts the three younger siblings gently: “Be good, Dad and Mom will be back soon.”

Ruins stretched across the landscape in the apocalypse after the nuclear war.