Isak: Younha-yang~ Let's not just meet in the beauty salon~ Let's see each other outside too~ haha^^
Younha: Sunbaenim~ It's nice to hear from you!
Isak: Ah~ sunbaenim~ haha Just call me unni~ Your hair is getting long~ Wow~ really~ you're always pretty~ how come~ hahaha
Isak: Really so pretty~ hahahaha
I don't know what kind of hood Younha was talking about, if anyone knows a translation....
source: Isak's twitter, Younha's twitter