What if the school's anonymous message board shows real names only to me?

Every day various secrets are uploaded anonymously on the school's anonymous app "Secretly." Min-ju, who has a crush on his childhood friend of ten years Ha-young, ends up seeing all the real names on anonymous posts because of an error while downloading Secretly and discovers that Ki-joo, the boyfriend of Ha-young, is cheating on her...

(Source: Naver Corporation, translated)