Only I Can See Them!

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...