In this world that is unpredictable and full of surprises, everyone goes through that chapter in their lives that is sweet and bitter at the same time. This is a story about people in their early twenties.

The main characters are four good friends in their early twenties. Guan Zheng wants to live life facing the future bravely, Xiao Jing is their junior with a tomboyish personality, Pin Yu is sweet and girlish while Ah Xiong is wooden and honest. They left their homes for their own reasons and have settled in a living arrangement where they stay together. The four friends meet Yan Yi, a girl around their age and also get to know a woman as sophisticated as Wei Han Ren.