It looks like Lee Kwang Soo has kept in contact with Jo In Sung and Sung Dong Il even long after the three of them starred in 'It's Okay, That's Love' together!�

SEE ALSO: Lee Kwang Soo returns to SBS entertainment program for the first time in two years

The three friends got together to celebrate the conclusion of 'Reply 1988,' which was a huge success for its twenty-episode run. In the photo, Sung Dong Il has on his biggest smile, a giant cake in hand which is attached with a note that reads, "'Reply 1988,' thank you. You all worked hard.'" Lee Kwang Soo, who is looking as happy as can be surrounded by his friends, wrote the very same words on his Instagram post.�

It's great to see Kwang Soo winding down from a busy schedule with his close buddies!�

1988.?????.???????.

A photo posted by ??? (@masijacoke850714) on Jan 16, 2016 at 6:09am PST