William Liao as Wei Lian () – The fifth brother. Naïve and kind, but lacks brain cells. His hobby involves bicycling.Wei Lian has a crush on Rong Chia, who is one older year than he is. Though she looks at him as a little brother at first, he eventually wins her heart with his naivety and pure goodness. Wayne Liu as A-Wei () – The youngest brother. Dancer and energetic. Hip-hop is his favorite. Of all the brothers, he is the most nonexistent one.Because he and Hsiao Chieh (小傑) have a crush on their housekeeper, Ya Tou, they would constantly fight for her heart. He usually pays more attention to Ya Tou even when he is among beautiful girls and is usually more helpful to her than the other brothers. After Hsiao Chieh (小傑) began a relationship with Hsiao Chieh (筱婕), he seizes his chance to confess to Ya Tou. The Sisters The Sisters is played by 9 members of the girl Hey Girl, (Tuan Lin) and (Candice Liu). Julie Tsai as Tong Tong () – The former class president of Class 206. She lost her position to Ao Quan due to a misunderstanding that led to a scandal before it was cleared up. She always acts tough in front of boys and acts as the girls' leader. Her best friend in the sisterhood is Mei Mei.She once dated a cool schoolmate named Hsiao Ma, but their relationship ended after she found out he was using her for his tricks against the brothers. Tina Chou as Da Ya () – The voice of reason. Strong, tough and righteous. She tends to think logical and fair for everybody else.After spending time with Ao Quan, they fall in love. She is the first (after Gui Gui) to find out about the brothers' relationship and contract agreements after she overhears Ao Quan and William talking about it. She was furious to find out the truth the hard way and broke up with Ao Quan. However, they reconcile after a while. Emma Wu as Gui Gui () – The most mischievous girl in the class. She can do tricks most people usually cannot. Of all the girls in class, she is the only one who knows of Ya Tou's secret identity and her relation to the brothers.She has been in love with Wang Chi since their first encounter. She was mistaken to have cancer