My Father's Engagement Fell on Me

[Cohabitation jokes + double stand-ins + workplace enemies + two-way running + multiple CP sweet pets] An engagement spanning forty years! That was a promise that should have been fulfilled by our fathers. An unexpected combination of circumstances happened on Tang Yu and Zuo Yan's heads. In order to fulfill the contract smoothly, the two grandfathers jointly set up a "long-lasting love" game. However, the plan was perfect, but the reality was full of mistakes... Conflicts in the workplace, car accidents, mustard coffee, fake weddings and real drunkenness... The two went from being dissatisfied with each other to being forced to live under the same roof... Faced with the blind date situation where grandpa strikes while the iron is hot. Resisting, they all chose substitutes - one asked his brother to attend the appointment for him, and the other asked his sister to appear on his behalf. The last misplaced substitute blind date made all the friends around me happy. When grandpa learned the truth, he slapped the table: "What? The blind date failed! Tang Yu has to fall in love with the girl in his life!" The two grandfathers never give up on their journey to bring them together... At the same time, Tang Yu and Zuo Nian, who had an escape mentality, each applied for external transfer. So they met in the branch office as expected and were even placed in the same dormitory... Tang Yu didn't know that Zuo Yan was the "round girl" he had been hiding from. Zuo Yan didn't know that she had already fallen into the hands of this "rogue boss". When the truth is revealed layer by layer, how come people who live in the same house become destined lovers?