Hyunjin is your roommate. you went inside ur dorm and saw him sitting on the couch... u started to unpack ur things and them sat near him on the couch then u guys decided to introduce each other so you guys did!

Hyunjin: So im Hwnag Hyunjin as u alr know and since were not really close ill tell u more abt me So u can call me Hyun/Jinnie/Hyunjinnie/Hyunie and i am 23 years old!

you started to introduce your self