24 years old. Patient and strong-willed, nicknamed Zhaozhao. He lived as a close sibling to Zhang Mu during childhood, but was actually adopted by his biological father's friend. After his adoptive parents divorced, he followed Jin Chang to Thailand, losing contact with Mumu. Now 24, he has endured a harsh life, throwing himself into underground fighting and racing to support his family. Through the reunited Zhang Mu, he faces his own feelings for the first time. Others: He runs a repair shop in Thailand with Sanrai and Xiaoyang. Close with Sanrai and Jin Fengzi. Because he was adopted by Jin Chang, he calls him by name rather than 'Dad'. He views Zhang Mu as more than a sister. He hides his racing and fighting from Zhang Mu. Others call him Yuzhou. He dislikes Wan Qing. He has a 9-year-old half-sister from Jin Chang's remarriage. Though Jin Chang has a house, he lives in a fairly comfortable room inside the repair shop.

19 years old. A bright and honest girl nicknamed Mumu. She grew up surrounded by the love of her parents and brother, but after her parents' divorce, she lived with her highly controlling mother. Her only support was her brother Jin Zhao, whom she lost contact with. At 19, while trying to find him, she hears her mother's revelation that he is not her biological brother. She then has an unexpected reunion in Thailand with the 'perfect' brother she always missed. Others: Met and became friends with Nana on the plane. She is quite good at racing, having learned it by watching her father. She thinks of Jin Zhao as more than a brother.

Jin Zhao's self-proclaimed best friend. Loyal and steadfast, he is the friend who silently stayed by Jin Zhao's side during his difficult years in Thailand. He is also the one who knows how much Jin Zhao missed Zhang Mu and helps them. Others: Runs a pet shop. Close with Jin Fengzi and Jin Zhao. Kind to Zhang Mu. Calls Jin Zhao 'Yuzhou'.

A former racing driver in his youth with a loyal and gallant personality. After the death of his racing colleague and friend Cha-rei, he adopted Cha-rei's son, Jin Zhao, and cherished him like his own, though he ultimately failed to be faithful to his family. Others: Drinks very, very heavily. Cherishes Jin Zhao and Zhang Mu. Runs a restaurant with Zhao Meijuan. Unaware that Jin Zhao is involved in fighting and racing. Does not know Wan Qing.

She once built a family with Jin Chang, but the marriage began to crumble when he brought Jin Zhao home without a word while she was pregnant with Zhang Mu. They eventually divorced, and she raised Zhang Mu alone. Due to her unhappy memories of Jin Chang, she is wary of Zhang Mu getting close to Jin Zhao. Others: Currently in Canada.

A woman with a fiery and blunt personality. She fell in love with Jin Zhao at first sight and persistently pursues him, refusing to back down even after being rejected. She is wary of Zhang Mu, who suddenly appeared claiming to be his sister. Others: Jin Zhao dislikes her. Her nickname is 'Viper' because of the blue dragon tattoo on her waist, though some say it's because of her personality. Calls Jin Zhao 'Yuzhou'.

Zhang Mu's friend in Thailand. They met on the plane while Zhang Mu was traveling to Thailand to find Jin Zhao, becoming a precious connection for her. Others: Lin Sui's cousin. Very kind. Introduced Zhang Mu to a language school and regular school.

Manager of a racing team and cousin to Zhang Mu's friend, Nana. She has a cool and free-spirited personality. She met Jin Zhao through racing and, fascinated by his precise and excellent driving skills, quietly helps him from the sidelines. Others: Loves Jin Zhao's egg fried rice.

A loyal friend who hangs around Jin Zhao, sharing in his rough daily life and the racing circuits. Others: Kind to Zhang Mu. Has red hair. Close with Sanrai and Jin Zhao. Calls Jin Zhao 'Yuzhou'.

Remarried to Zhang Mu's father, Jin Chang. She is raising Jin Xin, Zhang Mu's half-sister from her marriage with Jin Chang. Jin Xin is 9 years old, quick-witted but timid, and shy around Zhang Mu. Others: Approaches Zhang Mu without hesitation and treats her kindly. Runs a restaurant with Jin Chang. Unaware of Jin Zhao's racing and fighting. Does not know Wan Qing.