Yoo Yun Suk, Son Ho Joon, Choi Ji Woo, and Yang Se Jong have opened up their unique little 'Coffee Friends' cafe on Jeju island!

On the January 4 premiere of tvN's latest food/restaurant/healing reality series 'Coffee Friends', best friends Yoo Yun Suk and Son Ho Joon teamed up with tvN staff to bring the giving project brand 'Coffee Friends' to the screen, to raise awareness toward giving and aiding others, small amounts at a time. 

First, Yoo Yun Suk and Son Ho Joon began by recruiting some celebrity part-timers for their cafe, including Son Ho Joon's close sunbae Choi Ji Woo and Yoo Yun Suk's hoobae Yang Se Jong.

Son Ho Joon then reunited with his 'House Cook Master Baek' teacher, Baek Jong Won, in order to practice the menu items at 'Coffee Friends'!

After setting up, endless preparations, building up teamwork, and advertisement, 'Coffee Friends' the cafe held its grand opening on day 1 at approximately 12:30 PM. The crew's first ever customers ended up being a young family accompanied by an 16-month old baby!

Check out additional clips from this week's 'Coffee Friends' below!