I clicked "funny" on Facebook, but we went to the same high school.

Yeoreum didn't know about or use social media. Seeing Yeoreum in such a state, her friend Seol-ah, upset, finally explained everything about social media, including Instagram, Twitter, Band, and Cass, and pressured her to install it. Yeoreum eventually installed it, and tried everything, almost becoming popular. Then Seol-ah introduced her to another social media app. That app was Facebook, a social media app that's incredibly popular in our class these days. She was told to search for Lee Ji-