They looked like they were having a blast.

TVXQ‘s Yunho and BoA were recently spotted at an amusement park filming MBC-TV‘s I Live Alone together.

In photos that have been circulating on online communities, BoA and Yunho wore matching character headbands under a big parasol as they enjoyed their outing.

The pair had apparently visited Everland, Korea’s largest theme park located in Yongin, for the filming of I Live Alone.

Earlier that day, BoA and Yunho were also seen at the SM Entertainment building.

The two showed extraordinary chemistry and were even photographed holding hands in a friendly manner.

BoA and Yunho, who hare both managed under SM Entertainment, are known to have been very close friends for years.

Being the same age and being managed under the same agency for a long period of time most likely contributed to their close friendship.

Check out more photos that prove BoA and Yunho’s great chemistry and friendship below: