My Youth - Season 1

Manager Sung Je-yeon begins to look for Sun Woo-hae, the former child actor who has left the scene, to secure a role for her talent, Mo Tae-rin, on TV. She visits Woo-hae's flower shop and reunites with her first love from high school after 15 years, while also being tasked with finding the mysterious novelist, Jin Mu-yeong, for Producer Je-il.

As Je-yeon and Woo-hae share drinks, they reminisce about when Woo-hae first transferred to Je-yeon's high school as a student talented in writing. As the class president, Je-yeon looked out for Woo-hae and began to fall for him. However, due to his complicated familial circumstances and his responsibility to care for Eun Nu-ri, Hae failed to properly reciprocate her love.

Woo-hae accepts Je-yeon's offer, and Tae-rin and Woo-hae finally reunite for their two-part documentary. As they reminisce about their days as Beat and Bebop, the former national siblings, Je-yeon is tasked with creating a buzz for Tae-rin, who is starting to fade in the industry. However, an article is released regarding Woo-hae's past, causing chaos.

Even after his videos cause a stir, Woo-hae decides to continue with the shoot. The crew heads to an island to shoot a scene of Woo-hae and Tae-rin on the beach. However, the ferries are cancelled due to bad weather, and Woo-hae and Je-yeon happen to stay the night on the island with just one vacant room remaining and no other staff members around.

After their kiss, Woo-hae and Je-yeon grow awkward as Je-yeon is unsure about her feelings. Meanwhile, Tae-rin and Seok-ju reminisce about their high school days together. As Feel Entertainment looks for the mysterious author, Jin Mu-yeong, to renew their license of the novel, "World Made of Ash," Je-yeon steps up for the task.

Je-yeon is confused about her emotions toward Woo-hae, and Tae-rin doesn't know how she feels around Seok-ju. Woo-hae and Seok-ju continue their brotherhood amid the awkwardness between them and Pil-do. Meanwhile, Woo-hae gets an extra checkup as an anomaly shows up in his blood work, and the results come out at the worst possible time.

Both Je-yeon and Tae-rin develop feelings for their own love interest, and Je-yeon decides to take her shot with the perfect plan. However, things start to go awry as Je-yeon loses her job, and Woo-hae misses his date with Je-yeon as he collapses and is sent to the ER.

Upon hearing that Woo-hae is ill, Je-yeon feels lost and returns to her parents' home. Meanwhile, Woo-hae doesn't want to hurt Je-yeon and tries to distance himself from her. He also prepares for the worst and becomes cold to Nu-ri and demands that she meet her birth mother and reconcile.

When Jae-yeon is rushed into surgery, Woo-hae searches through hospitals to find her. Meanwhile, Nu-ri prepares for her photography practical exam while struggling with the decision of whether or not to meet her birth mother. Tae-rin unexpectedly crosses paths with Seok-ju.

Woo-hae, whose health is deteriorating, hides his condition while growing closer to Je-yeon. Meanwhile, Nu-ri feels conflicted as she takes her practical exam and prepares to meet her birth mother. Seok-ju discovers Woo-hae's illness, leaving him in shock and guilt. Woo-hae is urged to join a clinical trial, forcing him to face the reality of his condition.

Woo-hae and Je-yeon decide to spend their time as an ordinary couple, not thinking about the hardships that might come to them. Tae-rin and Seok-ju still need to adjust to each other, but their affections grow as they do so. Woo-hae is scared about his future, but for now, he tries to live an ordinary life like everyone else.

Woo-hae's family and friends find out about Woo-hae's condition. Woo-hae says that he doesn't want to leave the people he loves to get treatment, but everyone, including Je-yeon insists and tells him to do so. Woo-hae is away, but everyone is living their lives to the fullest. Je-yeon takes care of the flower shop while Woo-hae is away. Meanwhile, Woo-hae's new book has finally been published.