Maybe a Fake Gintama - Chapter 561: The Foundation of Love is Trust!

Chen Rui, an otaku from earth, is reborn into a human body in another world, who falls into the legendary evil, brutal world of the devil called Mozu where humans are treated as food. He has to survive while facing horrors of the devil, violent dragons and a variety of power enemies depending on a strange super system chip and his wits. Surrounded by Devil’s beauties such as black-bellied lolita princess, cold queens, violent dragons, charming poisonous devils …

Wanting to live in the Devil’s world is hard! Wanting to live in the Devil’s world as a human is harder! Wanting a human to be the devil’s son-in-law is hardest!

Let us see how a small otaku uses power and strategy step by step starting from an ordinary human to writing a legend as the devil’s greatest son-in-law.

- Description from Novelupdates

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.”