In the episode of 'Master in the House' aired on February 4, the members of the show―including Lee Sang Yun, Lee Seung Gi, Yang Se-hyung, and Yook Sungjae gave a phone call to TAEYANG for the mission.

In order to deliver hints by the third master of the show, TAEYANG was on the phone and tried to have conversations with the members.
Besides talking about the mission, TAEYANG broached his plans for the year, and he noted that he is looking forward to joining the national military service soon.
When talking about his duties as an active-duty soldier, TAEYANG took a deep breath with sighs.
Lee Seung Gi, who just got back from the military service, cheered TAEYANG by responding, "If there are any difficulties, just call me whenever."

He continued, "It is not a hard thing. You will do well, so have confidence!"

If you have not checked the episode of 'Master in the House', here is the part of the video with TAEYANG!
(SBS Star)