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The mini concert opened up with on-screen top band Crude Play, consisting of Lee Seo Won, UNIQ's Sungjoo, Shin Jae Min, and Jang Ki Yong, performing "In Your Eyes" (above) and "Peter Pan". 

The cast members all sat down for interviews led by MC of the day Lee Seo Won, who asked which of the actors/actresses were mood-makers on the set of the drama.

The cast then answered a question about how it felt first meeting one another on the drama set. 

Actress Hong Seo Young, who played the role of Yuna in the drama, performed her song, "Counting the Night Stars". 

Back to the interview session, the cast members showered one another with praise, with female lead Red Velvet's Joy thanking the director for leading the drama on behalf of the entire crew. 

Of course, they also had a confession session, where the actors and actresses came forward with uncomfortable situations while filming. Joy also revealed that she researched the songs from the original Japanese live version of 'The Liar of His Lover', listening to them often while on set. 

Mush & Co. then finally stepped up to the stage with their debut song, "Shiny Boy". 

Followed by a collaboration stage of "I'm Okay" by Mush & Co. and Crude Play to end the concert for the night. 

Check out the cast's final remarks, below. The final episode of 'The Liar and His Lover' airs on May 9.