Reactions to actor Jung Joon-won are unusual.

Jung Joon-won plays the role of Koo Do-won, a fourth-year obstetrics and gynecology resident, in the tvN drama 'Resident Playbook.' He vividly portrays the 'figure of a true adult' who takes responsibility for his juniors and the 'adult sexiness' that captivates viewers, making the character's charm stand out even more.

On the 26th and 27th, in episodes 5 and 6, Koo Do-won's careful advice and guidance to the clumsy first-year juniors drew viewers' attention. He firmly pointed out mistakes to Oi Young (Go Youn-jung), who could not contain her anger towards an intern, making her realize her errors, and he gave sharp advice to Eom Jae-il (Kang Yoo-seok), who relied on his seniors, helping him face reality while also caring for second and third-year juniors, creating a deep resonance with the audience.

Additionally, even amidst a busy schedule, his willingness to listen to Kim Sa-bi (Han Ye-ji) and provide advice, exemplifying the characteristics of a 'modern senior,' made Koo Do-won's charm stand out once again, leading many to rally for 'one workplace, one Koo Do-won.'

Moreover, in this episode, the romantic tension between Koo Do-won and Oi Young gradually surfaced, offering a sweet anticipation. Previously, Koo Do-won had drawn a firm line after Oi Young's confession, but he began to feel a little fondness when Oi Young boldly demanded an apology on behalf of her after Nam Eung-won (Kim Hye-in), who had stolen her research achievements, which made viewers' hearts race. Especially, the moments when he brushed off Oi Young's direct advances while nervously checking his surroundings and the warm, sexy smiles as he watched her cutely further immerse fans supporting Koo Do-won's love line.

Jung Joon-won is capturing the character of Koo Do-won, a 'jack-of-all-trades,' perfectly in terms of ability, personality, and charm, with nuanced acting that increasingly deepens the character as the episodes progress. Furthermore, the starkly contrasting demeanor he exhibits toward Oi Young according to his situation as a senior Koo Do-won and a bachelor relative has sparked hot discussion every episode, driving the high popularity of the show.

With comforting and charming performances that highlight the character's dimensionality, expectations are rising for how Jung Joon-won will depict Koo Do-won's narrative.

Meanwhile, 'Resident Playbook,' which showcases Jung Joon-won's diverse charms, airs every Saturday and Sunday at 9:20 p.m.

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