Daily Life After Marriage with Sister-In-Law

[The title and copywriting are tentatively decided, and the plot will not change] Sang Xu got married under the arrangement of his father. Married to a boy six years younger than him ——And, his ex-fiancé's biological brother. Facing the irritable young man in front of him who was always full of anger, Sang Xu sighed sadly. Although his nominal husband's dislike of this marriage made Sang Xu a little sad. But Sang Xu missed his ex-fiancé and pampered and doted on her husband as a younger brother. As time passed, he was relieved to find that his husband no longer seemed to hate him so much. Until one night, Sang Xu woke up inexplicably and found that she was held tightly in the arms of her husband who was supposed to be sleeping in the next room. * One day long after, Sang Xu picked up a yellowed diary at home. March 9 "I'm so annoyed. I'm getting married to my brother's boyfriend. You idiot, you're going to get married just because his dad told you to get married? My brother's not dead yet!" April 23 "He's quite nice... My brother and I are indeed brothers, tsk." June 19 "Think of me as your younger brother, okay, that's fine." The page was almost penetrated by the tip of the pen. July 6 "Holy shit, I fell asleep" "My brother woke up without a wife." August 13 "I woke up without a wife." "No, where is my wife who is so old?!" 2024.5.30 Intention: Love should be spoken loudly