Dahee caught Chunji peeping on the girls. Feeling disgusted by his actions, Dahee reprimanded him and threathened to tell the school. Chunji, scared of expulsion, begged her to keep the secret in exchange of telling the secret to get a man's heart. 

'C-can you t-teach me?' 'He likes the nerdy you not the real you.'

'You're the most beautiful girl on the planet' Oh great. The cat's out if the bag now.