Young actress Joo Arin is on the verge of making her big-screen debut, but she encounters an unexpected challenge while preparing for her role - she has to film a kiss scene despite never having had her first kiss. As Arin struggles to practice for the shoot, top star Kang Hajun, who is with the same agency, offers to help her by teaching her how to kiss. As they begin these secret lessons, Arin finds herself torn between immersing herself in the role and developing feelings for Hajun.
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