(BoA's Instagram)

BoA and TVXQ’s Yunho have been friends for a long time, and the SM Entertainment duo flaunted their friendship by uploading a selfie on BoA’s Instagram.

The two looked close with BoA’s head on Yunho’s cheek due to their height difference.

BoA said, “I was glad to see Yunho so healthy. This is my first time visiting a friend on military service. I hope to see him again when he comes out during vacation.”

She added that the TVXQ star bought her lunch.

TVXQ’s Yunho started his military service on Jul. 21 last year and is expected to finish on April 20, 2017.

By Jung Min-kyung (mkj1105@heraldcorp.com)