In the same city, four different girls enter different worlds of love; how do different views on love, different hobbies, different world views, and different backgrounds intertwine their deep friendship? In the same city, on the same side of water, four different girls were raised and walked into different lives; with different living habits, different values, and different life concepts, how to create a harmonious big family for them? In the same city, the same song, four different girls listened to everything and listened silently, stirring up four different love stories; many things, many people, many... Many...