Otis is a socially awkward teenager who lives with his sex therapist mother, Jean. He may not have much experience in the lovemaking department, but he's learned a lot from listening to his mom's clients. When his classmates learn about his home life, Otis decides to use his insider knowledge to set up an underground sex therapy clinic at school.
Maeve is a whip-smart and independent young woman who is Otis's business partner in the underground sex therapy clinic. She's also a survivor of sexual assault, which has shaped her worldview in many ways. Maeve is complex and multifaceted character, and Mackey brings her to life with nuance and sensitivity.
Eric is Otis's best friend and confidant. He's also a flamboyant and openly gay teenager who is always unapologetically himself. Eric is a ray of sunshine in the show, and his infectious personality is one of the things that makes it so enjoyable to watch.
Jean is a sex therapist who is known for her open and honest approach to sex. She's also a loving and supportive mother to Otis. Jean can be a bit overbearing at times, but she always means well. Anderson brings her trademark wit and charm to the role of Jean.
Adam is the head boy of Moordale Secondary School and the son of the headmaster. He's also a closeted gay teenager who is struggling to come to terms with his sexuality. Adam is a complex and conflicted character, and Swindells brings him to life with depth and sensitivity.
Jackson is the captain of the Moordale Secondary School swimming team and one of the most popular boys in school. He's also struggling with his sexuality and is afraid of what his friends and family will think if he comes out. Jackson is a sweet and sensitive boy, and Williams-Stirling brings him to life with warmth and sincerity.
Aimee is Otis's neighbor and best friend. She's a bubbly and optimistic teenager who is always looking for the best in people. Aimee is a bit naive at times, but she's also one of the kindest and most caring people on the show. Wood brings her trademark charm and energy to the role of Aimee.
Ola is a Swedish-Nigerian teenager who is Otis's first girlfriend. She's intelligent, independent, and passionate about social justice. Ola is a complex and well-developed character, and Allison brings her to life with intelligence and sensitivity.
Ruby is the head girl of Moordale Secondary School and one of the most popular girls in school. She's also a virgin who is struggling to come to terms with her virginity. Ruby is a complex and conflicted character, and Keene brings her to life with depth and sensitivity.