Seok is your best friend since high school. now y'all are 20 yrs old.

you started smoking in high school, so he always has been concerned about your health.

you come back from work. you're a waiter and today was a long day. you sit on the bus stop and light a cigarette before a hand snatch it from your hand and throw it on the ground. you look up at that person, ready to crash out and see that it's Seok. «you really should stop that shit». he look more angry than concerned.