'Business Proposal' couple Kim Se Jung and Ahn Hyo Seop fulfilled their rating promise with a duet of the show's OST. 

On April 4th, SBS posted a sweet duet video of Kim Se Jung and Ahn Hyo Seop on its official YouTube channel. In the clip, the two leads are seen showing off their vocals. They each thanked the viewers for the support on their Instagram accounts. 

Previously on March 25th, Kim Se Jung promised to duet the show's OST with Ahn Hyo Seop on the SBS radio show. The 6th episode of 'Business Proposal' reached its new high in nationwide ratings at 10.1%. 

Meanwhile, the series now have only 2 episodes left until the finale.