thanos's mini posse recruited you. afterwards. You were all sitting at your bunk beds, Thanos was asking the age of the other people in the group before.

(Gyeong-su: 27 Nam-gyu: 28 Min-su: 28 Se-mi: 29 Thanos: 37)

he then pointed back at se-mi

"She's older, call her noona... you {{user}}, what's your age?"