Initially, "Sex Education" revolved around the life of the awkward teenager Otis, played brilliantly by Asa Butterfield, and his sex therapist mother, Dr. Jean Milburn, portrayed by the talented Gillian Anderson.

Otis embarks on a unique journey by starting his own sex therapy business at Moordale Secondary School, despite his limited personal experience. Along the way, he falls head over heels for the school's enigmatic bad girl, Maeve, portrayed by Emma Mackey. However, as the seasons unfolded, the show's narrative expanded its scope.

The character ensemble grew, with a spotlight on Otis' flamboyant gay best friend Eric, played by Ncuti Gatwa, and the once-secretly gay bully Adam, portrayed by Connor Swindells.

Maeve's funny best friend Aimee, portrayed by Aimee Lou Wood, and the heartwarming lesbian couple Lilly (Tanya Reynolds) and Ola (Patricia Allison) all had their stories intertwined.

As we eagerly await the upcoming fourth season, which will be the show's finale, let's take a closer look at where the characters have been.

Eric, more than just Otis's sidekick, has undergone significant growth throughout the series. Ncuti Gatwa's portrayal has shone brightly in every scene he shares with Otis. Behind his outgoing persona lies hidden pain. Eric is unashamed of his sexuality, but he grapples with the judgment of others, particularly his tormentor, Adam. However, Season 3 saw a transformation in Adam, as he shed his former bullying self and opened up emotionally, eventually falling in love with Eric.

Eric's life takes a dramatic turn after a trip to Nigeria, where he encounters Oba (Jerry Iwu), another openly gay man, and experiences the freedom of being his true self in a gay nightclub. This newfound revelation challenges his relationship with Adam, leading to a heartbreaking breakup. Eric's decision to embrace his identity and pursue his own path is a testament to his growth.

Dr. Jean Milburn, portrayed by Gillian Anderson, faces a rollercoaster of emotions in Season 3. Her unexpected pregnancy with Ola's father, Jakob, brings both joy and challenges. However, a paternity test hints at a shocking revelation, potentially causing tension in her seemingly idyllic relationship with Jakob.

As a sex therapist, Jean has embraced a life of openness and exploration, but her past encounters may come back to haunt her in Season 4, creating a web of complications.

Maeve Wiley, with her iconic pink hair, piercings, and leather jacket, has undergone a remarkable evolution in the series.

From being the "bad girl" with a troubled background, she discovers her true potential as a brilliant student.

In a pivotal moment, Maeve is offered a chance to study in America, a decision that tests her belief in herself.

However, the most heartbreaking breakup unfolds in Aimee and Steve's relationship. Aimee's transformation from a bubbly blonde to a survivor of sexual assault strains her relationship with the kind-hearted Steve.

The only relationship in a state of strength is Lilly and Ola. They went from a near breakup, with Lilly thinking Ola judges her oddities, to stronger than ever. Alas, this couple won't be in Season 4.

While their future together may not be explored in the upcoming fourth season, fans will always remember them as a shining example of resilience and the enduring bond that can exist between two people deeply in love.

Otis and Ruby, two characters whose paths have intertwined in "Sex Education," have had a relationship marked by complexities and personal growth. From a rocky start to moments of vulnerability and connection, their dynamic has evolved in unexpected ways. 

Ruby, initially known for her popularity, and Otis, the sensitive therapist-in-training, have shared genuine moments that challenge their preconceptions of each other. While their future remains uncertain, their interactions have added depth to the series and left fans eager to see how their story will continue to unfold in the upcoming fourth season of Sex Education.

As Sex Education embarks on its fourth and final season, viewers are left with a multitude of questions.

Where will these beloved characters find themselves? Will Jean and Jakob's relationship endure the paternity revelation? Can Eric and Adam find happiness separately? And will Maeve and Otis cross paths once more? 

Season 4 promises to deliver answers, offering a satisfying conclusion to a series that has touched hearts and minds with its exploration of love, growth, and self-acceptance. The stage is set for Sex Education to bid its farewell, and fans can hardly wait to see how it all unfolds.