The Secret Life of Professor Ha

Jaeyoung is a young, promising professor of Business at K University. A long-time favorite among students for his excellent lectures and kindness, it seems like he has everything a man would wish for. But even he had a little secret - Jaeyoung is a big-time otaku of magical girl animes. Then one day, a student of his, Saewoong, finds him holding a dakimakura, effectively exposing Jaeyoung's otaku lifestyle. Desperate to keep his double life a secret, Jaeyoung agrees on a deal with Saewoong that would shake his life...

(Source: POCKET COMICS)

Note: The chapter count includes 11 extras.