Because of Asian standards for Filial piety you spoiled brat, now shut up and laugh at how despite her saying that because they are in a fake relationship he doesn't have to worry about breakups or nagging only for her to have been nagging at him at work and during the "dates"
Ngl, disappointed with the end there, was hoping for a more romantic setting. But thats kinda my fault for reading a manwha called “After work affairs” 1st chapter is a solid 7/10