My friend's close older brother

One day, while talking with a friend, I meet my friend's older brother and a close friend... ? (Park Sung-ho, Lee Sang-hyeok, Myung Jae-hyun: 3rd year of high school Han Tae-san, Kim Dong-hyun: 2nd year of high school Kim Woon-hak, Moon Ha-na: 1st year of high school