During the October 22 press conference for "No Breathing" at CGV Wangsimni in Seoul, Lee Jong Suk talked about his close friends Seo In Guk and Kim Woo Bin.

On Seo In Guk, he revealed that he depended on his movie co-star during tough times. Lee said, "In Guk seems to have a tough image, but he's a person who supports me through my hardships by sending me messages of strength. I don't know how he knew about my problems, but I'm really thankful when he does that."

Seo In Guk replied to this by saying, "Rather than competing with him, I view Lee Jong Suk as a sunbae I could learn from. He is younger than me and he is the veteran in acting, but we were able to film "No Breathing" together so I'm very grateful."

Of his best friend Kim Woo Bin who he starred with in the drama "School 2013", he was asked if they've talked about Kim Woo Bin's movie "Friend 2", to which he said, "I watched the teaser for his movie to tell him it was really good."

"I said to him, 'If you go to the screening of my movie, I'll go to yours. If you don't, I won't either,'" said the actor, showing his close relationship with his friend. "He's the only person I can rely on when I have problems."