Kim Seung Woo proposed to his wife Kim Nam Joo, when she came to visit after he finished work.

On the episode of KBS 2TV 'Happy Sunday - 1 Night 2 Days' that aired on the 26th, Kim Seung Woo aroused curiosity by saying 'I called someone with dignity' as he was carrying out a mission.

Kim Seung Woo saw the other members leaving, and was panicking as he was waiting for his friend to come. After the friends all left, his friend with 'dignity' came out of a car in the sports field. That person was Kim Seung Woo's wife, Kim Nam Joo.

Kim Nam Joo waved her hand cooly and exited from her car. Kim Seung Woo stated, "she is the person I care for most, and she is the person I'm closed to." He asked the staff, "even though this may be buttery, wait for 60 seconds." He then started his sketchbook proposal.

Kim Seung Woo held up his sketchbook in front of Kim Nam Joo and it said, "thank you for coming. You are the person that unexpectedly rolled in. I love you," and he had a lovey dovey event. Kim Nam Joo's eyes were watery, and she said, "after we married, this is the first time Kim Seung Woo did something like this," and she was teary.

The married couple were heading back towards their home. While they were being filmed in the car, they stated, '1 Night 2 Days,' and Kim Nam Joo received a surprise kiss from her husband.