All Hiro wants is to get through his first day of school unnoticed, but he becomes the target of the school bully, Winston. With the help of new friends Celeste and Mike, Hiro proves that he's never too small to make a difference.
Holly gets her first period the day before the Springwood Talentime Jamboree. With the show's success hinging on Holly's performance, Celeste must choose between the show and Holly's well-being.
When DJ Marco's voice breaks, his fear of losing his angelic voice manifests as a monster that steals voices. Can the Puberteens work together to restore Marco's confidence, but without their voices?
The Puberteens become trapped in a hairy situation with Meera - and her hairy inner monster. To keep spirits up, Mike recounts the story of his own unusual hair growth journey.
Celeste is determined to be the perfect gymnast by mastering the extremely difficult move, "The Pretzel". However, her journey to perfection soon takes a dangerous twist.
Mike is embarrassed about crying in public after watching a film. With the help of Celeste, Hiro, and a froggy companion, Mike embarks on a mission to "man up". Will Mike ever be tough enough?
Hiro struggles with performance anxiety at the Inter-class Basketball competition. Things go awry when he accidentally brings forth a slimy version of his superhero self - The Blubbering.
Thrilled at the arrival of her first pimples, Celeste joins the Springwood's Acne Anonymous Forum. Tensions run high when an anonymous participant, "Tako", criticises Celeste for her toxic positivity.
Following the events of the previous episode, the Puberteens get carried away with helping Tako with her acne problems, and unintentionally expose her. Celeste has a life-and-death encounter with an inner monster.
Springwood is plagued with the foulest of stenches. With the help of classmate Benji, the Puberteens investigate the cause of the smell, and discover a shocking fact about their destiny.
It's the Springwood summer camp. Mike tries to ask Meera out to a Smashing Durians concert, with Celeste's help. Elsewhere, Hiro learns from the mysterious Librarian about the coming of a great monstrosity.
When Hiro has to go through the Inter-school English Olympiad alone, it feels like the first day of school all over again. He befriends Victor, who is like him in nearly every manner, except for how they deal with the school bully.
Mike is showered with attention as the ambassador of the popular Pim and Pop juice drink - the Mega Mangosteen Mix. However, he soon discovers that the school's favorite drink harbours a delicious, dark secret.
Following the Pim and Pop debacle, the Puberteens have become the public enemy. Celeste takes it upon herself to single-handedly rehabilitate the Puberteens' image, and encounters a nemesis of old.
Winston becomes ashamed when a picture of his first pubic hair is leaked throughout the school. Mike and Hiro try to help Winston, as Celeste goes on a journey of self-reflection with the mysterious Librarian.
Things go awry when a wave of shame overwhelms Springwood, bringing out inner monsters everywhere. Mike and Hiro must try their best to destroy the monster without Celeste's help. Will the trio reunite in this time of grave danger?
