Since his parents passed away, the male protagonist Shiyu has been fostered in the home of his parents' old friend. He has grown up with his sister from the Tan family who is a few years younger than him. Slowly, his thoughts became no longer pure, and he slowly had a different feeling when he looked at her graceful figure. He decisively fled and moved out of Tan's house, but who knew that the same torture would not only be suffered by him, but also by his sister Tan Niannian. She also fell in love with him irresistibly...
