Kim Hae-sook and Yoo Ah-in in Tough as Iron (2013)

Yoo Ah-in and Kim Sung-oh in Tough as Iron (2013)

Kwon-tae Ahn and Yoo Ah-in in Tough as Iron (2013)

Kim Hae-sook at an event for Tough as Iron (2013)

Yoo Ah-in at an event for Tough as Iron (2013)

Kim Hae-sook, Kwon-tae Ahn, and Yoo Ah-in at an event for Tough as Iron (2013)

Kim Sung-oh and Lee Si-eon at an event for Tough as Iron (2013)

Kwon-tae Ahn at an event for Tough as Iron (2013)

Kim Hae-sook, Kwon-tae Ahn, Yoo Ah-in, Kim Sung-oh, and Lee Si-eon at an event for Tough as Iron (2013)

Jung Yu-mi and Yoo Ah-in in Tough as Iron (2013)

Kim Jeong-tae and Kim Sung-oh at an event for Tough as Iron (2013)