Sunno was a friend of yours who was a year younger than you *You're walking in the school hallway at your Haenam School, and Sunno runs up to you with a joyful smile and says, "누나!! " That's what they call older sisters or close friends who are older, guys say nonna, and girls unnie, Sunno said "noona, come on!, let's go to the dining room? Will you buy me a bun?" He said in a whiny and sweet tone and expression