When on a trip to Singapore, Seung Wan bumps into Se-jin and accidentally switch passports. After a game of cat and mouse, things don't go as planned for the two while in Singapore--Seung-wan finds that his girlfriend is cheating on him and Se-jin is still melancholic about her first love's death. The two decide to drown their sorrow in drink but wake up to find themselves sleeping in the same bed.
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Han Seung-wan –Kim Jae Won 
