KBS drama 'Big' that is airing their final episode of the series on the 24th revealed a shocking sad ending preview.

On July 23rd, the 15th episode of 'Big' that aired showed Kang Kyung Joon(Gong Yoo) acting as if he has forgotten all the memories between him and Kil Da Ran(Lee Min Jung).

Kyung Joon who is donating his blood to Seo Yoon Jae lost consciousness for a bit, and realized when he and Seo Yoon Jae change back to their bodies, he will forget about all the memories between Kil Da Ran(Lee Min Jung) and himself.

Kyung Joon who gains consciousness for Da Ran's sake acted as if he has lost all the memories between the two.

Kyung Joon acted coldly and even threw away the possessions between the two as if it didn't have any meaning to him. Da Ran, ends up crying and telling him "Okay. I'll throw away everything too." and accepted the situation.

Da Ran hurriedly prepared to transfer down to a country school, Kyung Joon who felt guilty confessed to her "When I change back, I forget everything that happened while I was in this body."

Kyung Joon then takes Da Ran to the lake where the accident between Yoon Jae and Kyung Joon occurred and told her "Forget about everything between us," and threw the watch that Da Ran gave him into the lake.

Da Ran, jumps into the lake to look for the watch and runs to the meeting place of the families and confesses "I can't act as if nothing happened. Listen everyone. I love KKJ." The families were captured in shock and Kyung Joon was shown tearing up. Ending the episode with this last scene.

In the preview for the last episode however, Kyung Joon's body is shown going through health complications and Da Ran and Kyung Joon were portrayed in a traffic accident.

The viewers have been commenting "Do all three of them die? Oh my god that's uncalled for." , "Whatever is the ending, there will not be a happy ending."