Cha/Yim family •
Michelle Yim as
Eliz Yue Kai-yin (于佳妍), Natalie's strict mother. Eliz is an acclaimed ballet dancer and pampers her younger granddaughter Echo, but was cold towards her step-granddaughter, Venus. • Angelina Lo as
Loe Fa (魯花), Ha's care-free mother. •
Elena Kong as
Natalie Cha Heung-shin (查向善), the strong-willed stay-at-home mother of two academically accomplished children. Influenced by her own strict mother, Natalie is demanding of her two daughters, and is highly involved in her children's academic progress. She is part of the PTA (parent-teacher association) at her children's school, St. Gabriel School. •
Ben Wong as
Yim Ha (嚴夏), Natalie's husband, a flat inspector, and the family's sole breadwinner. Ha has a softer approach in parenting his two daughters. •
Kaman Kong as
Venus Yim Sin-yue (嚴茜瑜), Ha's 17-year-old daughter and Natalie's stepdaughter, a
Form 6 student St. Gabriel School, and the head of her class. Venus is filial, hardworking, and has a passion for ballet, although her step-grandmother has criticised her for her lack of talent in dancing. She has a crush on Hayden. •
Sophia Hung as
Echo Yim Sin-chung (嚴茜聰), Natalie and Ha's 11-year-old daughter, a Primary 6 student at St. Gabriel School. Echo is naturally talented at playing the piano, although her true passion is track & field.
Man/Cheng family •
Sharon Chan as
Claire Man Ka-hei (文嘉熙), the dean of discipline at St. Gabriel School. Claire is a single mother of a 9-year-old boy, and is the sole guardian of Hayden, her teenage brother. Her husband died when Issac was young. •
Matthew Ho as
Hayden Man Leong-hei (文亮熙), Claire's younger brother, who is in Form 6 at St. Gabriel School. Hayden was a gifted student, but an incident during primary school leaves him indifferent about his education. Hayden has a crush on ex-classmate Shun, who was expelled by St. Gabriel after getting
pregnant. • Ivan Chan as
Isaac Cheng Tsz-yi (鄭梓宜), Claire's academically talented 9-year-old son who is enrolled in Primary 6 at St. Gabriel, skipping two grades. Sometimes, he visits the school janitor named Sing Gat-si.
Ko family •
Koni Lui as
Rebecca Yuen Yuen (袁圓), nicknamed Princess Rebecca, an overindulging parent who spoils her 11-year-old son, Oscar. She comes from a wealthy family and is a member of St. Gabriel's PTA. •
Savio Tsang as
Ko Yan (高仁), Rebecca's husband and Ha's close friend. Yan owns several properties and the owner of a popular noodle restaurant. His
rags to riches story is an inspiration to his neighbours. • Coleman Tam as
Oscar Ko Wai-ting (高葦庭), Rebecca and Yan's spoiled 11-year-old son.
St. Gabriel School admin and students •
Willie Wai as
Sing Gat-si (成吉思), Claire's friend, a janitor at St. Gabriel and enters the school for a special reason. • Arnold Kwok as
Hugo Lin Kwok-kai (連國佳), Venus and Hayden's classmate who represents Hong Kong in an international basketball competition. Though popular in school, Hugo comes from an abusive family. He has a crush on Claire. •
Hebe Chan as
Meg Moe Sau-mei (毛守美), Venus' classmate and close friend. • Mak Ling-ling as
Tam Kim-lan (譚劍蘭), the head principal of St. Gabriel, who admires Claire. • Ceci So as
Yau Mat-mat (邱蜜蜜), the headmistress of the St. Gabriel's primary school, who always points against Claire. • Chung Chi-kwong as
Wong Sheung-ming (黃尚鳴), the chairman of St. Gabriel's PTA, who later resigned due to his health condition and was replaced by Natalie. •
Eileen Yeow as
Mrs. Cheung (張太), a member of the PTA. • Iva Law as
Mrs. Chin (錢太), referred to as Daisy, a member of the PTA. • Pauline Chow as
Mrs. Chau (周太), a member of the PTA. • June Chan as
Mrs. Wong (黃太), a member of the PTA. •
Aurora Li as
Miss Kan, a primary school teacher and the vice chairman of the PTA.
Other characters •
Becky Lee as
Frances Hung Ngan-chi (洪顏姿), the project manager of a real estate development agency, who is friends with Ha. • Mak Ka-lun as
Chong Ding-tong (莊定湯), Ha's co-worker. •
Russell Cheung as
Chung Lok-hoi (鍾樂凱), Ha's co-worker. •
Apple Chan as
Luk Siu-shun (陸筱純), Hayden's former classmate. Shun was expelled by the school after getting pregnant, and is struggling to make a living. She has a two-year-old, nicknamed "Little Tiger." •
Virginia Lau as
Miss Kelly Chan, a highly renowned pianist who takes over teaching and improves Echo's piano skills. Has ulterior motive for teaching Echo. ==Viewership ratings==