Jin, a rookie actor, begins a new job on set alongside Akin a beloved star. Akin helps Jin make it through a challenging first day by helping him conenct with the emotions of his character.

Akin's fever lands him in the hospital, meanwhile, Jin joins a new agency that specializes in creating hype around their artists.

Jin and Akin find another opportunity to film together. After some time apart, Jin has grown in his confidence and skills.

Jin and Akin's relationship grows stronger, but tension emerges when Jin takes over the title of the "Hottest Actor" award. 

While Akin rehearses his play and clashes with lead actor Johnny, a drunken night blurs boundaries. When Jin calls from abroad, it’s Johnny who answers.

Akin is being stalked by a malicious fan—a “sasaeng.” Because of the sasaeng’s twisted actions, Akin is dragged into a serious crisis.

Akin faces a new challenge as someone tries to blackmail him, causing him to push Jin further away.

Thinking he cheated, Akin tries to end it with Jin. But after the truth comes out, love deepens and Akin makes a life-changing proposal.

After a night of drinks, Akin wakes up in Jin’s room. Jin starts giving him rides for 21 days, but on the final day, things take an unexpected turn.