Gree (real name Kim Dong-hyun), the son of comedian Kim Gu-ra, met up with his entertainment industry friends just three months before his military discharge.
On the 20th, Gree posted several photos on his Instagram with the caption "We have long since given up on studying...".
The photos show Gree, who is currently serving in the Marine Corps, joyfully spending time with Hong Jin-kyung and Nam Chang-hee. Recently promoted to sergeant, Gree took a break before his discharge and enjoyed a good time with his friends, taking photo booth pictures together.
The trio has previously showcased their special chemistry through the web entertainment show 'Study King Jjingeun Genius'.
Fans reacted with comments like "Jjingeun Genius Family forever" and "I love the combination of the three of them".
Meanwhile, Gree, who enlisted in July last year, is set to be discharged on January 28 of next year. He released a new song titled 'Goodbye' ahead of his enlistment.