21 Days (2017)

When a girl who is not familiar with love stories like "Tisha" decides to confess her love for "Rain", the popular boy she has been secretly in love with for a long time. This job requires a helper! Tisha promised to use 'Love Medicine' that 'Senior Julie', senior of the Science Club, gave her to come and warn that Let her and Rain drink before confessing their love. Then everything she hoped will come true. But an unexpected story happened when 'Rain' refused to drink the love medicine that Thicha gave. But it turned out to be 'warm', Rain's best friend who drank the whole glass of Julie's love medicine mixed with water!