On JTBC's 'Abnormal Summit' on October 3, MC GREE, also known as Kim Gu Ra's son, appeared as a guest and talked about the difficulties of having an older girlfriend... The thing is, she's only one year older, but that one year is difference enough because it makes her a legal adult while he remains a minor!
MC GREE said, "With men and women in relationships, in order to incite jealousy, the girlfriend would go to a bar. I would worry, but I can't go to places like those," making the others laugh. He can't check in on her because he's underaged and wouldn't be allowed in!
He continued, "I like games, so I'd go to PC rooms, but I can't because I'm a minor. It turns off [automatically] for me in the middle [of a game]."
In conclusion, he said about becoming an adult, "I want to go to karaoke [with my girlfriend]." It's just a year difference - you'll be an adult soon enough and be able to go anywhere with her!