(portrayed by Joe Zheng) - A genius with an IQ of 200.  Intelligent, handsome, and is capable of many things.  There is nearly nothing that can he can't do.  But it is also because he is too smart that to him, everything in life can be easily accomplished.  As a result, he feels that his life is lacking in objectives.  Xiang Qin's appearance brought about a whole succession of unexpected things in Zhi Shu's once calm and peaceful life.  Zhi Shu, who has never experienced the meaning of the word defeat, doesn't understand Xiang Xin's undefeatable and fearless spirit and slowly starts to develop an interest in her.  At the same time, he gets influenced by Xiang Qin's simple and naïve logics and from there, he has found his goal in life to study medicine… 

(portrayed by Ariel Lin) - Has a good heart, simple-minded, straight forward, optimistic and has patience.  Yet she's not very smart and also knows nothing about house works.  Sure, she is always making mistakes and causing trouble but nevertheless, she still works diligently and tirelessly towards her goal.  Her first year of High School, she fell in love at first sight with Zhi Shu during the opening ceremony of the new school year where Zhi Shu was making a speech on behalf of the new students.  In her third year of High School, she makes up her mind to express her feelings to Zhi Shu but gets heartlessly rejected.  She tries to convince herself to not like Zhi Shu anymore.  However, she never expected that her father and Zhi Shu's father are good friends of many years and that they would move in to live with Jiang's family after an earthquake that made their house collapse.  This is how Xiang Qin and Zhi Shu start their new life living under the same roof…

(portrayed by Cyndi Zhao) - Zhi Shu's mother, a housewife, a bit senseless, likes liveliness, and loves taking pictures very much.  She gets along very well with Xiang Qin and as a result, she thinks up of all sorts of ways to get Xiang Qin and Zhi Shu together.  She often disguises herself and goes to Zhi Shu's school to investigate on Zhi Shu and Xiang Qin's situation or to spread news that the two of them are going out together.  However, her disguise is often seen through by other people.  Ah Li Sao, who loves her son very much, always believes that what she has planned out for her child's life is the best for him.  Instead, the result brings about Zhi Shu's retaliation and planted signs of conflicts for mother and son.

(portrayed by Zhang Yong Zheng) - Zhi Shu's father, the owner of Pan Da Toy Company.  Has a good-natured, kind personality and very loyal.  He hopes with all his heart that Zhi Shu would get into his alma mater, the University of Taiwan, to study and after graduating, Zhi Shu can succeed his own company.

(portrayed by Tang Cong Sheng) - Xiang Qin's father, the owner of "Good Luck" Japanese Restaurant.  He has excellent cooking skills and is good friends with Zhi Shu's father since their school days.  He brings up Xiang Qin all by himself after his wife passed away.  He feels bad that Xiang Qin doesn't know how to cook and do housework, believing that it's his fault that he hasn't taught her well enough.

(portrayed by Zhang Bo Han) - Zhi Shu's younger brother.  He adores and admires his elder brother Zhi Shu very much.  His biggest wish is to become his brother's assistant after Zhi Shu succeeds their father's company.  He doesn't look highly at adults who are not too smart and as a result, he is not too fond of Xiang Qin.  He regards Xiang Qin as a research object for his summer vacation homework.  He often pays attention to the foolish things that Xiang Qin does.  Yet he also gradually gets moved by Xiang Qin's foolish and sincere ways.  During a family trip, he witnessed Zhi Shu stealing a kiss from Xiang Qin.  He is the only person who knows that Zhi Shu likes Xiang Qin.

(portrayed by Jiro Wang) - Xiang Qin's classmate.  He's not too bright but he is very good at sports.  He has started liking Xiang Qin since the first year of High School and his biggest wish is to get married to her.  In order to create a beautiful home with Xiang Qin together, he did not get into a university after graduating from High School.  During the day, he would work in the school's cafeteria, and at night, he would be an apprentice at The Good Luck Restaurant.

(portrayed by Tiffany Xu Wei Ning) - Comes from a rich family.  Because she admires Zhi Shu's ability and elegant demeanor, she chooses to go to study at the Technical Institute of Tonan University.  Intelligent, beautiful, and capable - Xiang Qin just can't match up to Zi Yu, who has all these good qualities.  Each time they see each other, they would argue.  Yet when they both feel threatened by the force of a new love rival, Sha Sui Zi, they are able to join and work together.  Even though she likes Zhi Shu very much but she is the type of girl that knows when to hold on and when to let go.

(portrayed by Liu Rong Jia) - Xiang Qin's classmate.  Has a generous personality and acts like a tomboy.  Speaks loudly, moves roughly, has her own personality and thinking.  She is Xiang Qin's good friend, always giving her advices to Xiang Qin and not afraid of her getting angry.  Later she goes out with a guy who is into music.

(portrayed by Petty Yang) - Xiang Qin's classmate.  After graduating from High School, she and Xiang Qin both went to Literal Institutes.  She loves dressing up and putting on make up and you often find her putting on nail polish.  The significance of her life is to be a good wife and nestle in the arms of a man.  Once in awhile, she would have her sights on a guy and would forget all about her friends.  When Xiang Qin is wronged, she and Ya Nong, would bravely stand out to criticize Zhi Shu.  But once they are done with what they have to say, they would hurriedly run away.

(portrayed by Jason) - Zhi Shu's elder High School classmate.  The tennis club's two-faced guy.  Usually, he would be very good-natured with people but once he holds up a tennis racket, he would become an extreme terror.  He likes Zi Yu a lot but unfortunately, even though he has the heart, Zi Yu doesn't reciprocate his feelings and has never paid him any attention.  His personality is a bit deceitful and a bit wicked.  He often uses Zhi Shu's news in exchange for benefits with Xiang Qin.

(portrayed by Gan De Men) - The director of Hokueisha Society.  Has a calm and self controlled personality, is an extremely outstanding entrepreneur.  He admires Zhi Shu's talent very much because he intentionally wants to introduce his granddaughter, Sha Sui Zi, to Zhi Shu.

(portrayed by Lai Zhi Wei) - Zhi Shu's High School classmate.  In class, he is considered to be a pretty close friend of Zhi Shu's.  He has a moderate and kind-hearted personality.

(portrayed by Wu Wen Hong) - Ah Jin's classmate.  He is always following Ah Jin around and making trouble.

(portrayed by Wang Di Jun) - Ah Jin's classmate.  He is always following Ah Jin around and making trouble.

(portrayed by Chen Bo Zheng) - Tonan High School and Tonan University's principal.  He follows by the principle that "you only teach a certain type of people."  In his opinion, only those students in the A, B classes are worth the investment and the painstaking care.  As for the other students who study at the school, they are merely there for the purpose of supporting the school's electrical bill.

(portrayed by Yao Cai Ying) - Class A's teacher.  She is very proud of her Class A students.  With regards to love, she is afraid of failures and is hesitant to proceed.  Yet she would be moved by Bei Cun's persistence.

(portrayed by Hong Liao Nang) - Class F's teacher.  A teacher who is filled with the enthusiasm to teach.  Even though he is always looked down at by other teachers in the school, but he still deeply believes that whether a person studies well or not, is not a decisive factor in that person's life and future.