The female high school student Chu (bori) lives with her brother Ling Ling and her younger sister Qian with her parents. One day he was caught by Orange Lianghui (Shimizu) who lived in the same apartment and was tossed back and forth by Lianghui's unreasonable orders. At this time, Takata (Banyuan), who moved out a few years ago, came back. At the beginning, Zi was naturally attracted by Zi as he used to guard himself, even though he was constantly hindered by Lianghui, he was still in contact with Zi, but in fact Zihuai had an unknown purpose. At this time, Chu also knew Ling's secret.